An embodiment of the invention discloses a power and refrigeration cogeneration system. The power and refrigeration cogeneration system comprises a wave power generation device, an ocean current power generation device, an ocean thermal energy conversion and solar energy combined power generation subsystem and a refrigeration subsystem. The ocean thermal energy conversion and solar energy combined power generation subsystem comprises a solar thermal collector, the wave power generation device is connected with a first water pump of the ocean thermal energy conversion and solar energy combined power generation subsystem, and the solar thermal collector absorbs solar energy to perform superheat treatment on a working medium of the ocean thermal energy conversion and solar energy combined power generation subsystem. The ocean current power generation device is connected with a second water pump of the ocean thermal energy conversion and solar energy combined power generation subsystem. A cold water output end of a first condenser is connected with an input end of a second condenser of the refrigeration subsystem. The power and refrigeration cogeneration system has advantages that the water pumps are powered by wave energy and ocean current energy, and ocean thermal energy and solar energy are adopted for thermal collection and power generation, so that electricity consumption and energy consumption of the power and refrigeration cogeneration system are greatly reduced.