Abstract: Based on the wave data measured by AWAC from 2011 to 2012 in Haitan Bay of eastern Pingtan sea, the wave characteristics of the sea area were obtained statistically. The annual wave direction of Haitan Bay mainly concentrats in NE-E-SE direction and the constant wave direction is ENE with a frequency of 67.56%. Strong wave direction is in E direction and the max H_1/10 wave height is 5.73m. In the whole year, the wave height is mainly 3level wave, and the annual frequency is 41.97%. The H_1/10 wave height mainly concentrats between 0.40 and 2.20 m with the frequency of 68.70%. The period mainly concentrats in 2.0～7.0 s with frequency of 98.20%. The wave energy of the sea area is calculated and analyzed by the energy spectrum integration based on the measured data. The wave energy is presented by the wave power densityP_w.P_whas obvious seasonal variation characteristics which are strong in autumn and winter and weak in spring and summer. The averageP_win autumn and winter can reach 8.50～10.00 kW/m. The annual average value of P_w is about 5.50 kW/m, indicating that the sea area is rich in wave energy. When the measured wave data is applied to the empirical formula of wave energy, the proportional coefficient α of P_w approximation formula is different under different wave factor combinations . The calculation results show that the calculated P_w with Hs-T_1/10combination and Hs-Tz combination are the best choice and their corresponding α values are 0.34 and 0.45, respectively.