Abstract: The article designed a new wireless telephone voice monitoring system that is based on WIFI module. The system samples and records the telephone voice by use of main controlling chip SC6138 produced by SiLan Company. The telephone voice audio signal is saved as files in SD card and USB. At the same time the voice files stored is transferred live to the remote monitoring terminal through WIFI module when needed. First the hardware circuit of this system is designed and the working principle is elaborated on for each function module of the system. At last the software for the major operational modules and their flow chart are designed. The testing results of the system find that it is of a high mobility and without a host machine it can store voice and be remotely monitored via WIFI.