A laser frequency stabilizing system for Doppler lidar wind measurement is developed, which has the advantages of compact structure and flexible operation. The radio frequency modulating signal is generated by the direct digital frequency synthesizer (DDS), the laser frequency drifts are demodulated by the analog mixer, and the functions of the bus controlling, signal processing and proportional-integral differential (PID) servo controlling are implemented by the high integrate chip of digital signal processor (DSP) as the heart of the frequency stabilizing system. The measured laser frequency drifts are less than ±17 kHz during 2.5 h, and whose root mean square (RMS) error is 5 kHz, and absolute frequency stability is better than 200 kHz. The anti-interference performance is also measured. The system will take 30 ms to get back into stabilization when a regular disturbance with the frequency of 6 Hz is put on the Fabry-Perot interferometer (FPI). The system can be applied to Doppler lidar wind measurement.