Energy management contracting static payback period calculating method

The invention discloses an energy management contracting static payback period calculating method. The method is used for calculating the energy management contracting static payback period according to different project types. The energy management contracting static payback period calculating method comprises the following steps: carrying out project information entering; carrying out specific scheme calculating; if being an energy-saving benefit sharing type, calculating the static payback period m; if being an energy trust type, calculating static payback period n; comparing the m with n; if the m is equal to the n, the two schemes being available; if the m is smaller than the n, selecting the energy-saving benefit sharing type; if the m is larger than the n, selecting the energy trust type; and selecting an investment method which enables the payback period to be short. According to the static payback period calculating method, the energy-saving benefit sharing type, energy-saving guarantee type and energy cost trust type can be selected reasonably static for calculating the payback period, thereby improving reliability and safety of energy management contracting economic benefits.