The invention provides a data processing method, device and system based on demand response resources. When power demands transmitted from a client are received, the method matches a functional database corresponding to the power demands according to the power demands, further determines analysis data corresponding to the power demands so as to process the analysis data by using the processing logic of the matched functional database to obtain and issue a final response result. It can be seen that it can fully give scope to the advantage of the mass data resources in a power service management platform, can enhance the fitness between the response result and the power demand required by the user, can expand the kinds of the power demands required by the user, and can improve the power using satisfaction of the user to process the analysis data by using the processing logic of the functional database to obtain the response result.