The invention discloses a water and electricity co-producing system utilizing wind energy and solar energy, and belongs to the technical field of utilization of new energy resources. The water and electricity co-producing system comprises a wind-driven generator, a battery energy storing device, an energy distributing and controlling system, a sea water desalting device and a power supply system controller, wherein the wind-driven generator, the battery energy storing device, the energy distributing and controlling system, the sea water desalting device and the power supply system controller are connected onto a connecting bus; the sea water desalting device is connected with the battery energy storing device; the energy distributing and controlling system is connected with and controls the battery energy storing device and the power supply system controller. By using the technical scheme provided by the application, the problems that wind and electricity are abandoned and fresh water is insufficient on a sea island and in a coastal area are solved; the unstable wind energy is sufficiently utilized to produce the fresh water and to supply electric energy; the problem of the scale formation when the solar energy is utilized to desalt sea water and to directly distill the sea water is solved; the water and electricity co-producing system is green and environmentally friendly; the effective utilization on the random and intermittent wind energy is realized.