This system is a wireless signal recorder based on the software radio. Laying the foundation on the virtual instrument technology, combining the microelectronics technology and the computer technology , the wireless signal recorder which can take samples continuously is composed from a PXI-E5622 ADC、a virtex5 FPGA and a computer. Owing to the function of demodulation, it’s easy to get to know the quality of the signal and to judge the working state of the signal source. The recorder will simplify the testing process and save manual labor when used in the test of wireless communication equipment.