1. An energy management control system based on cloud computing, comprising: a field controller including a user parameter defining unit for defining user defined parameters, the field controller being used for field controlling each energy consumption device according to the user defined parameters and sending the user defined parameters to a cloud computing management control platform; an energy consumption parameter collector for collecting parameters related to energy consumption of each energy consumption device and sending the collected parameters to the cloud computing management control platform; and the cloud computing management control platform for adjusting a field control mode of the field controller for each energy consumption device according to the collected parameters related to energy consumption of each energy consumption device and the user defined parameters, the cloud computing management control platform comprising: a receiving unit for receiving the parameters related to energy consumption of each energy consumption device collected by the energy consumption parameter collector and the user defined parameters; a first determining unit for determining whether the collected parameters related to energy consumption of each energy consumption device and the user defined parameters are matched with each other and generating a determination result; an energy consumption model generating unit for generating corresponding energy consumption models according to the parameters related to energy consumption of each energy consumption device when the determination result of the first determination unit is positive; a data base for history energy consumption models for storing various types of history energy consumption models; an energy consumption restriction parameter setting unit through which the user inputs energy consumption restriction parameters of the generated energy consumption model; a second determining unit for searching the data base for history energy consumption models for the corresponding history energy consumption models according to the energy consumption restriction parameters input by the user and then determining whether the generated energy consumption models and the corresponding history energy consumption models in the data base for history energy consumption models are matched with each other and generating the determination result, and if matched as the result of determination made by the second determining unit, adding the generated energy consumption models into the data base for history energy consumption models; and a control mode adjusting unit for adjusting the field control mode of the field controller for each energy consumption device when the determination result of the first determination unit or the second determination unit is negative.