provided are a dynamic flow sampling apparatus and dynamic flow sampling method . according to embodiments of the present invention , by collecting load information about a load of an internet network and dynamically performing a flow sampling with respect to a packet based on the load information and a reference value , the load on an internet network device and a data processing time for a traffic analysis may be reduced . further , since an amount of traffic in a population to be analyzed may increase , reliability on an analysis result may be enhanced .