a dimension measuring system comprising a portable dimension measuring device having a terminal radio device , a dimension measuring section , and a display unit for displaying a dimension measurement and enabling the use of a portable measuring section even in a place where radio communication is not available , has been disclosed . the portable dimension measuring device comprises a radio communication state detection circuit for detecting whether communication is possible and , when in a state of not being capable of communicating with the base radio device , displays the generated dimension measurement on the display unit and , when a state of being capable of communicating with the base device is brought about , automatically resumes the operation of transmission of the generated dimension measurement to the base device .