The invention belongs to the technical field of auto accessories, and particularly discloses a combined type LNG refrigerator and air conditioner device. The combined type LNG refrigerator and air conditioner device comprises an LNG storing bottle, and an energy converting device I communicating with the LNG storing bottle, wherein a temperature sensor I is mounted on the energy converting device, and the energy converting device I communicates with an engine air supply system, a third party medium storing tank and a frequency conversion pump; the frequency conversion pump communicates with a dual-purpose refrigerating-heating air conditioner and a dual-purpose refrigerating-heating refrigerator through a temperature control valve I and a temperature control valve II, a temperature sensor II and a temperature sensor III are mounted in the dual-purpose refrigerating-heating air conditioner, and a temperature sensor IV is mounted in the dual-purpose refrigerating-heating refrigerator; and the dual-purpose refrigerating-heating air conditioner and the dual-purpose refrigerating-heating refrigerator communicates with the energy converting device I, and an energy converting device II communicates with the energy converting device I through a temperature control valve IV. The combined type LNG refrigerator and air conditioner device is reasonable in structural design and the utilization rate of equipment is increased.