The full DC inverter condensing unit adopts DC inverter compressor, and can intelligently adjust the working frequency and working mode according to actual working conditions to output the cooling capacity according to demand. When the temperature difference between the storage temperature and the set temperature is relatively large, the inverter unit operates in the high frequency state. When the storage temperature approaches the set temperature, the unit is switched to the low frequency operation state, and only output the cooling capacity required to maintain the storage temperature .It greatly reduce energy consumption.