Disclosed is an energy-saving type absorption refrigerating machine (heat pump). The energy-saving type absorption refrigerating machine (heat pump) comprises a generator, a condenser, an evaporator, an absorber, a solution heat exchanger, a solution pump and a refrigerant pump, and further comprises an energy economizer. The energy economizer comprises a separation device and an absorption device, wherein the separation device and the absorption device are communicated through a liquid blocking device. The separation device and the condenser are communicated with each other, and the bottom of the absorber is communicated with the solution heat exchanger through the absorption device. Part of a concentrated solution which passes through the solution heat exchanger enters the absorption device, and is led by the absorption device to the absorber. When the energy-saving type absorption refrigerating machine (heat pump) is used, a liquid-state refrigerant generated by the condenser is processed through throttling and pressure reduction so as to generate refrigerant steam, the generated refrigerant steam is absorbed by the concentrated solution which is led to the absorption device, and the refrigerant steam which is processed through flash evaporation is recovered and releases latent heat; and the latent heat is taken away by a dilute solution which comes from the bottom of the absorber and is low in temperature, and the temperature of the dilute solution is increased. The consumption of an external heat source can be effectively reduced when heating concentration is conducted in the generator, and then the performance of a unit is improved.