The invention discloses a data centre integrated energy supply device using LNG power generation refrigeration. The data centre integrated energy supply device comprises an LNG power generation refrigeration system, a natural gas combined cooling and power system, a monitoring, regulating and control system and an electric supply refrigerating system; a natural gas exhaust opening of the LNG power generation refrigeration system is connected with a natural gas inlet of the natural gas combined cooling and power system, and the LNG power generation refrigeration system comprises an LNG vaporization expanding power generation refrigeration system and a refrigerant expanding power generation refrigeration system; the natural gas combined cooling and power system comprises a burning power generation system and an absorption refrigeration system; the electric supply refrigerating system is mainly composed of a cold water air-conditioner; and the monitoring, regulating and control system regulates and controls the power supply and cold supply ratio of the LNG power generation refrigeration system, the natural gas combined cooling and power system and the electric supply refrigerating system, and the power energy and cold energy supply stability and the generator set stability are guaranteed. According to the data centre integrated energy supply device, power supply and cold supply of a data center and a high-energy-consumption building can be achieved, the system efficiency is high, the broad spectrum performance is high, and a large number of expenditures for electric charge can be saved.