The invention relates to a two tickets combined inference billing method of power grid based on work task analysis, characterized by comprising the steps of a work ticket billing task analysis, a formatted operation task, a work ticket inference and an operation ticket inference, wherein, the work ticket billing task analysis is responsible for extracting required work task content, work equipment, work place, work time and obtaining a required state b for operating on XX equipment from the inputted task; the formatted operation task is responsible for acquiring a current state a of the work equipment from a power grid topology real-time knowledge base, and sending the operation task with a format of switching the XX equipment from state a to state b to an operation inference engine; the work ticket inference is responsible for integrating a work ticket with a normative format through a personnel arrangement sub inference, a safety precautions sub inference and a dangerous point sub inference separately in accordance with the analyzed task; and the operation ticket inference is responsible for billing an operation ticket focused on the operation sequence through an operation task analysis, an operation sequence inference and an operation sequence evaluation. The method is scientific and reasonable, has the advantages of convenience, speediness, nicety, suitability, etc., and realizes the intelligent management of the electric power scheduling.