This paper analyzes the assessment and control tasks of smart grid operation adequacy.The complexity of the problem is dissected in terms of demand，disturbance，controlled objects and time-lag.The decision-making process of adequacy control is also discussed including information acquisition，estimation of the needed dispatch power，parametrization of adequacy events，definitions of adequacy index，dynamics of power balancing and reserving，on-line adequacy assessment， dispatch and control of reserve resources.A risk-based conceptual model for dynamic optimization is presented，and a decoupling and coordination solution method is also proposed to give a global quasi-optimum result.