The invention relates to an air-conditioning heat pump device with four working modes, which comprises a compressor, a gas-liquid separator, an oil separator, a front four-way valve, a back four-way valve, a hot-water heat exchanger, an air-conditioning heat exchanger, an external heat exchanger, electronic expansion valves and a check valve, wherein the gas-liquid separator is connected with thecompressor, and the exhaust end of the compressor is connected with an air inlet of the front four-way valve; an air outlet of the front four-way valve is connected with an air inlet A of the back four-way valve; an air outlet D of the front four-way valve is connected with an air-conditioning heat exchanger; the air-conditioning heat exchanger is connected in series with the second electronic expansion valve; the external heat exchanger is connected in series with the first electronic expansion valve; the hot-water heat exchanger is connected in series with the check valve; and the exhaust end C of the front four-way valve is communicated with the gas-liquid separator after being connected in parallel with the exhaust end C of the back four-way valve. By adopting the structure, people can conveniently select different functions when using the device; and the air-conditioning heat pump device can achieve a single hot water function, a single cold air function, a cold air and hot waterfunction and a single warm air function and is convenient for use.