System and method for monitoring operation energy efficiency ratio of water chilling unit

The invention relates to a system for monitoring energy efficiency ratio of operation of a water cooler set and a monitoring method thereof. The system comprises a controller for monitoring the energy efficiency ratio of operation of the water cooler set, a local monitoring computer, a remote monitoring computer and a frozen water supply temperature sensor of a cold supply pipe network, a frozen water return temperature sensor of the cold supply pipe network, a frozen water flowmeter of the cold supply network and a power sensor of a refrigeration compressor which are correspondingly connected with the water cooler set; the frozen water supply temperature sensor of the cold supply pipe network, the frozen water return temperature sensor of the cold supply pipe network, the frozen water flowmeter of the cold supply network and the power sensor of the refrigeration compressor are connected with the controller for monitoring the energy efficiency ratio of operation of the water cooler set respectively; and the local monitoring computer and the remote monitoring computer are connected with a signal of the controller for monitoring the energy efficiency ratio of operation of the water cooler set through a convertor I and a convertor II respectively. The system is suitable for the water cooler set of a central air conditioning system using electric power as primary drive energy; and the measured energy efficiency ratio of operation of the water cooler set is suitable for supervising daily energy-saving operation of the water cooler set.