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In view of the deficiencies such as single functionality, poor anti-interference ability, low precision, small memory space and low speed of traditional data acquisition systems, a DSP-based data acquisition system for acoustic pressure and vibration was developed to cope with this problem. A built-in FPGA inside the instrument ensured the high-speed data acquisition, and the combination of DSP and DDR2 made the system can get efficient FFT computation from the embedded software rather than the program running on the remote host. Furthermore, the Ethernet protocol greatly improved the reliability and safety during data transfer progress. The result of environment test showed that the data acquisition system had a stable performance and was especially suitable for the applications in severe conditions such as high temperature, low temperature, sharp shock, salt spray environment, and completely met the requirements of sampling and analyzing acoustic pressure and vibration signals.