A solution searching system includes a utility server, a model running server, a database server, and a central controller server. The utility server is configured to generate a first model input file according to a first issue description file. The model running server is configured to generate a first solution key according to the first model input file and a prediction model. The database server is configured to read a first solution from a database according to the first solution key. The controller central server is configured to transfer the first issue description file to the utility server, to transfer the first model input file to the model running server, to transfer the first solution key to the database server, and to output the first solution when receiving the first issue description file.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A solution searching system, comprising a utility server configured to generate a first model input file according to a first issue description file; a model running server configured to generate a first solution key according to the first model input file and a prediction model; a database; a database server configured to read a first solution file from the database according to the first solution key; and a central controller server configured to: when receiving the first issue description file, transfer the first issue description file to the utility server; transfer the first model input file generated by the utility server to the model running server; transfer the first solution key generated by the model running server to the database server; and output the first solution file read by the database server from the database. 2. The solution searching system of claim 1, wherein the central controller server is further configured to: when receiving a plurality of solved second issue description files, transfer the plurality of solved second issue description files to the utility server to make the utility server generate second model input files and second solution files corresponding to each of the plurality of solved second issue description files respectively according to the plurality of solved second issue description files; make the database server store each of the second solution files according to a second solution key of each of the second solution files respectively; and transfer each of the second model input files and the second solution files corresponding to each of the plurality of solved second issue description files to a model building server to make the model building server build the prediction model according to the second model input files and the second solution keys corresponding to each of the plurality of solved second issue description files and a data mining algorithm. 3. The solution searching system of claim 2, wherein the first solution file reads by the database server from the database is a second solution file of the second solution files that has a second solution key matched with the first solution key. 4. The solution searching system of claim 3, wherein each of the first solution key and the second solution keys includes at least one sub key, and a number of sub key included in the second solution key matched with the first solution key is no less than a number of sub key included in the first solution key. 5. The solution searching system of claim 2, wherein the utility server generates the second solution files corresponding to each of the plurality of solved second issue description files respectively according to the plurality of solved second issue description files is generating the second solution files corresponding to each of the plurality of solved second issue description files respectively according to words stated in a plurality of critical columns of each of the plurality of second issue description files, wherein each of the second solution files includes the second solution key, a column of solution instruction and a column of root cause, and the column of solution instruction stores an address storing an instruction document. 6. The solution searching system of claim 2, wherein the central controller server transfers data with the utility server, the database server, the model running server and the model building server by network packets and application programming interfaces of the central controller server, the utility server, the database server, the model running server and the model building server. 7. The solution searching system of claim 1, wherein the utility server is further configured to: generate an attribute description file according to words in the first issue description file; and generate a predictor file according to the attribute description file; wherein the utility server generates the first model input file according to the first issue description file is generating the first model input file according to the predictor file. 8. The solution searching system of claim 7, wherein the utility server generates the attribute description file according to the words in the first issue description file is generating the attribute description file by referencing a standard wording table to the words in the first issue description file. 9. The solution searching system of claim 1, further comprising a web server configured to provide a web page interface for receiving the first issue description file, transfer the first issue description file to the central controller server, and display the first solution outputted by the central controller server on the web page interface. 10. A method of operating a solution searching system, wherein the solution searching system comprises a utility server, a model running server, a database, a database server, and a central controller server, the method comprising: the central controller server transferring a first issue description file to the utility server when the central controller server receives the first issue description file; the utility server generating a first model input file according to the first issue description file; the central controller server transferring the first model input file to the model running server; the model running server generating a first solution key according to the first model input file and a prediction model; the central controller server transferring the first solution key to the database server; the database server reading a first solution file from the database according to the first solution key; and the central controller server outputting the first solution file read by the database server from the database. 11. The method of claim 10, wherein the solution searching system further comprises a model building server, the method further comprising: the central controller server transferring a plurality of solved second issue description files to the utility server when the central controller server receives the plurality of solved second issue description files; the utility server generating second model input files and second solution files corresponding to each of the plurality of solved second issue description files respectively according to the plurality of solved second issue description files; the database server storing each of the second solution files according to a second solution key of each of the second solution files respectively; the central controller server transferring each of the second model input files and the second solution keys corresponding to each of the plurality of solved second issue description files to the model building server; and the model building server building the prediction model according to the second model input keys and the second solution files corresponding to each of the plurality of solved second issue description files and a data mining algorithm. 12. The method of claim 11, wherein the first solution file reads by the database server from the database is a second solution file of the second solution files that has a second solution key matched with the first solution key. 13. The method of claim 12, wherein each of the first solution key and the second solution keys includes at least one sub key, and a number of sub key included in the second solution key matched with the first solution key is no less than a number of sub key included in the first solution key. 14. The method of claim 11, wherein the utility server generating the second solution files corresponding to each of the plurality of solved second issue description files respectively according to the plurality of solved second issue description files is generating the second solution files corresponding to each of the plurality of solved second issue description files respectively according to words stated in a plurality of critical columns of each of the plurality of second issue description files, wherein each of the second solution files includes the second solution key, a column of solution instruction and a column of root cause, and the column of solution instruction stores an address storing an instruction document. 15. The method of claim 10, wherein the utility server generating the first model input file according to the first issue description file further comprises: the utility server generating an attribute description file according to words in the first issue description file; the utility server generating a predictor file according to the attribute description file; and the utility server generating the first model input file according to the predictor file. 16. The method of claim 15, wherein the utility server generating the attribute description file according to the words in the first issue description file is generating the attribute description file by referencing a standard wording table to the words in the first issue description file. 17. The method of claim 11, further comprising the central controller server transferring data with the utility server, the database server, the model running server and the model building server by network packets and application programming interfaces of the central controller server, the utility server, the database server, the model running server and the model building server. 18. The method of claim 10, wherein the solution searching system further comprises a web server, the method further comprising: the web server providing a web page interface for receiving the first issue description file; the web server transferring the first issue description file to the central controller server; and the web server displaying the first solution outputted by the central controller server on the web page interface.