DataSocket is a kind of realtime transfer technology in LabVIEW,which has some advantages such as fast speed,easytoprogram,supporting multiclient,and can be used to transfer images. A set of LabVIEW programs including DataSocket were designed to research the speed of transfering images through DataSocket from server PC to client PC.Since receiving one image took more time than sending one,server must delay several miliseconds after sending out one image which meant that the shorter delay time, the faster tansfer speed was.Once the shortest delay was recorded,the highest transfer speed could be figured out. According to the result,transfer speed difference is related to image format,the fastest one can reach 31 MB/s after compressing within 300 M bandwidth local area network;Images with the same format but different sizes have similar transfer speed and smaller ones’ is a liitle faster than big ones’.