The invention discloses an electric power and electric quantity balance method comprising an intermittent power supply, and belongs to the technical field of electric system planning and operation. The method can describe a typical output curve and an output bound daily characteristic curve of an intermittent power supply. On the basis, the typical output curve and the output bound daily characteristic curve can be compared with the power generation capability and a load daily characteristic curve of a traditional controllable power supply to finish electric power and electric quantity balance calculation so as to eliminate a defect of overlarge errors caused by the output randomness and volatility characteristics of the intermittent power supply of a traditional engineering method.