Requirement electricity charge optimization method of data center

The invention relates to a requirement electricity charge optimization method of a data center. The method comprises: whether not all values of an external load capacity lambda(t) are 0 is determined; a maximum value lambdamax(t) among the values of the external load capacity lambda(t) is obtained and an operation mode X(t) of the data center is set to be 0; whether the lambdamax(t) meets a formula I is determined; if so, the minimum operation node number mmin(t) is obtained according to load response time D, a node service rate mu, and the operation node number m(t) and then the lambda(t) is set to be 1; otherwise, the operation mode X(t) is set to be 1; the operation mode X(t) and the minimum operation node number mmin(t) are introduced into a formula to obtain a required electricity charge and an electricity consumption charge, wherein an F expresses a node operation power, a PD expresses a requirement prices, and a PE expresses a consumption price in the formula. According to the invention, the requirement cost and the consumption cost are taken into consideration; the charging mode meets an actual situation of the data center; the electricity charge optimization of the data center is divided into two problems of peak power reduction and electricity usage amount; the operation node is in a full load state; the electricity consumption of idle nodes is avoided; and the node utilization rate is improved.