The invention discloses an indoor water supply device, which comprises a purifying water barrel, a cabinet body and a kettle; a vertical clapboard is arranged in the cabinet body, and the vertical clapboard separates the cabinet body into a storage cabin and an operation cabin; a water pump cylinder body is arranged in the operation cabin, and the lower part of the water pump cylinder body is provided with a pedal; the pedal is connected with every pumping piston rod, and the bottom part of the pedal is provided with several pedal springs; an elastic water absorbing pipe is arranged in the cabinet cavity, and a water supply pipe is arranged on the water pumping cylinder body; the water supply pipe is connected with an external water supply nozzle. The indoor water supply device has the beneficial effects that the structure is reasonable and water in the purified water barrel can be pumped effectively; when water is exchanged, it is not required to lift up the purified water barrel andthen reversely place in a water taking slot at the upper end of a water dispenser; during the water taking process, the container is unnecessary to hold to receive water; thus the indoor water supplydevice is convenient and labor-saving in use, and can prevent excessive water amount, avoid water overflow in the kettle.