The high proportion of new energy penetration has affected the economy and benefits of wind power and photovoltaic power generation in China, resulting in the decline of power grid flexibility, insufficient peaking capacity, difficulty in local consumption, and the abandonment of wind and light. In view of the predicament of the current power system, it is necessary to vigorously develop heat storage technology, study thermal storage technology of molten salt based on local consumption of wind power and photoelectric power, improve the capacity of peak and frequency regulation of power system, and effectively exert the advantages of shifting peaks and valleys. Based on the use data of schools and hospital boilers in Jiangsu Province, the potential of electric energy substitution is analyzed. And life cycle cost model（LCC）is established to conduct economic comparative analysis of various types of boilers, including initial investment cost, operating cost, maintenance cost, so as to provide a strong basis for equipment selection and investment optimization.