The invention provides an energy management system applied to industrial park. The system comprises an energy management center server, a data acquisition unit and an auxiliary communication device. The energy management center server is connected with the data acquisition unit, the data acquisition unit is connected with the auxiliary communication device, and the auxiliary communication device is connected with a field device and a power dispatching mechanism. The field device comprises a power conversion system (PCS), a battery management system (BMS), a photovoltaic grid-connected inverter, a wind-power converter, a gas-driven combined cooling-heating-power supply system, a ground-source heat pump system, branch circuit switchgears, an ammeter, a gas meter, a heat meter and an environmental monitor. According to the energy management system applied to industrial park, energy production and consumption processes are monitored in real time by collecting energy production and consumption information of the industrial park in order to count and analyze the energy production and consumption, and based on energy-saving diagnosis, energy-saving suggests are formed; and the energy source is uniformly dispatched by planning a coordination control strategy, thereby exerting functions of optimizing energy medium balance, improving environmental-protection quality, reducing comprehensive energy consumption of enterprises and reducing energy utilization costs of the enterprises on the industrial park.