Proposes a data acquisition system which is applied in electromechanical wave energy converter analog device, realizes the realtime collection of generator’s voltage, current and acceleration signals. Use NI sbRIO 9606 and NI 9683 instead of traditional DAQ assistant as the hardware part of the system, controllability and applicability are strong. The software part is LabVIEWbased to provide friendly HMI. Data are recorded and read in TDMS file format which needs small memory space and is easier to maintain. Actual operation shows that the system is stable and reliable, and meets the realtime analysis and control requirement of the wave energy converter system.