The invention discloses a microwave, steam and baking integrated machine. The microwave, steam and baking integrated machine comprises an inner cavity shell, a magnetron, a waveguide device, a steam generator, a heating pipe, a tray and an electrical control assembly, wherein a containing cavity is formed in the inner cavity shell; the magnetron is arranged on the outer surface of the inner cavityshell; the waveguide device is communicated with the magnetron and the containing cavity; the steam generator is arranged outside the inner cavity shell and located on the side wall of the inner cavity shell or located on the bottom of the inner cavity shell; the heating pipe is arranged in the inner cavity shell and located on the top of the inner cavity shell; the tray is detachably arranged inthe inner cavity shell and located on the bottom of the inner cavity shell; the electrical control assembly is arranged outside the inner cavity shell, and the electrical control assembly is electrically connected with the magnetron, the steam generator and the heating pipe. Compared with the prior art, the microwave, steam and baking integrated machine has the advantage of taking up little spacein a kitchen.