The invention discloses an intelligent power grid soft computing system architecture based on cloud service, all information requirements of an intelligent power grid are provided as cloud service, and the cloud service comprises three levels, namely a user layer, a soft network layer and an input data layer for computing. The soft network layer comprises a user interface unit, an analysis/application unit, an integrated bus (ESB) unit, a platform unit and a security unit; The user interface unit comprises a user self-service module, a payment system module, a user notification module, a network portal module and a reporting tool module; The analysis/application unit comprises a power grid operation analysis module, a client analysis module and a business analysis module; And the securityunit comprises a risk management module, a data management module, an identity management module and a data security module. The method can be used for the soft computing service of the smart power grid, provides an effective solution, and has good feasibility and practical value.