As concentrating solar power (CSP) is equipped with heat storage, it has good regulation performance and the ability to regulate across the day. CSP units have the ability to replace conventional units, which is called as capacity benefits. Since the benefit of CSP capacity is closely related to factors, such as operation mode and heat storage duration of CSP stations, the benefit evaluating of CSP capacity plays an important role in the future development of CSP. A method for evaluating the benefit of CSP stations on the basis of equal reliability is proposed. It takes into account the effects of peak shaving method, heat storage duration, new energy scale and CSP scale. The production simulation program calculates the system operating status of 8 760 hours throughout the year on a weekly scale, taking into account factors such as unit start-stop, hydro-electrical day-to-day adjustment, pumped-storage day-to-day adjustment and day-to-day adjustment of CSP stations. Finally, the effectiveness of the proposed method is verified by simulations of the actual power grid in the northwestern region, which shows that CSP stations have capacity benefits.