A refrigeration system, comprising: an indoor heat exchange module configured for refrigerant to absorb heat; and a plurality of outdoor heat exchange modules configured for the refrigerant to dissipate heat, and each of the outdoor heat exchange modules comprising a compression device, an evaporative condenser and a liquid supplement device; and wherein the outdoor heat exchange modules are switchable between a standby mode and an active mode; in the standby mode, the outdoor heat exchange module is disconnected from the indoor heat exchange module; when the outdoor heat exchange module is switched to the active mode, the outdoor heat exchange module is connected to the indoor heat exchange module, the compression device starts up, and the liquid supplement device supplies cooling liquid to the evaporative condenser during an startup process of the compression device; wherein when the outdoor heat exchange module is in the active mode, the compression device is used to compress a low-temperature and low-pressure gaseous refrigerant output from the indoor heat exchange module into a high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant is condensed in the evaporative condenser to convert the refrigerant from a gas state to a liquid state; and then the liquid refrigerant flows back to an input terminal of the indoor heat exchange module, and the refrigerant absorbs heat in the indoor heat exchange module and is converted from the liquid state to the gas state, and flows back to the compression device; wherein the liquid supplement device comprises: a liquid storage tank configured to store cooling liquid; and a refrigeration device configured to provide cooling energy to the cooling liquid in the liquid storage tank; wherein when the outdoor heat exchange module is in the standby mode, the refrigeration device operates to maintain the cooling liquid in the liquid storage tank within a preset temperature range. an indoor heat exchange module configured for refrigerant to absorb heat; and a plurality of outdoor heat exchange modules configured for the refrigerant to dissipate heat, and each of the outdoor heat exchange modules comprising a compression device, an evaporative condenser and a liquid supplement device; and wherein the outdoor heat exchange modules are switchable between a standby mode and an active mode; in the standby mode, the outdoor heat exchange module is disconnected from the indoor heat exchange module; when the outdoor heat exchange module is switched to the active mode, the outdoor heat exchange module is connected to the indoor heat exchange module, the compression device starts up, and the liquid supplement device supplies cooling liquid to the evaporative condenser during an startup process of the compression device; wherein when the outdoor heat exchange module is in the active mode, the compression device is used to compress a low-temperature and low-pressure gaseous refrigerant output from the indoor heat exchange module into a high-temperature and high-pressure gaseous refrigerant; the high-temperature and high-pressure gaseous refrigerant is condensed in the evaporative condenser to convert the refrigerant from a gas state to a liquid state; and then the liquid refrigerant flows back to an input terminal of the indoor heat exchange module, and the refrigerant absorbs heat in the indoor heat exchange module and is converted from the liquid state to the gas state, and flows back to the compression device; wherein the liquid supplement device comprises: a liquid storage tank configured to store cooling liquid; and a refrigeration device configured to provide cooling energy to the cooling liquid in the liquid storage tank; wherein when the outdoor heat exchange module is in the standby mode, the refrigeration device operates to maintain the cooling liquid in the liquid storage tank within a preset temperature range. a liquid storage tank configured to store cooling liquid; and a refrigeration device configured to provide cooling energy to the cooling liquid in the liquid storage tank; wherein when the outdoor heat exchange module is in the standby mode, the refrigeration device operates to maintain the cooling liquid in the liquid storage tank within a preset temperature range.