The wave energy converter-type floating breakwater is an integrated device of floating breakwater and wave energy converter, with both functions of wave protection and wave energy capture. The integration can effectively reduce the cost of wave energy converter with one single function. Researchers have proposed a variety of structural types of this integrated device. Among them, the asymmetric type has some advantages in hydrodynamic performance compared with the symmetric type under one single direction wave. In this study, two structural types of a square box-triangle baffle and a square box-vertical baffle are chosen to investigate the hydrodynamic characteristics and wave energy capture characteristics by numerical models. Based on the viscous fluid theory, the numerical model takes the Navier-Stokes equation as the control equation, and uses VOF method and immersion boundary method to solve the free surface boundary and fluid-structure interaction. The variation trend of hydrodynamic performances (transmission coefficient, energy dissipation and energy capture ratio) of the integrated device under different conditions of incident wave period, water depth and displacement volume are explored. The results show that, for the near shore waves, the vertical baffle type integrated device is suitable for the smaller period waves of 5−6 s, while the triangular baffle type integrated device is suitable for the bigger period waves of 6−8 s. As the water depth increases, the wave energy capture ratio generally shows a slow growth trend. In the case of the same draft of the main floating body (different displacement volume), the transmission coefficients of the two structures are basically the same. In the case of the same displacement volume (different draft of the main floating body), the vertical baffle structure has better wave-proof effect, and the wave energy capture performance of the triangular baffle structure is better than that of the vertical baffle structure.