The photovoltaic output power is obvious random, fluctuant and intermittent, which has certain extent of negative effects on power system. TOU method is adopted to guide the consumers to change the power consumption way. And the load profile is regulated to track PV power output and improve the correlation of them, which leads to increment of PV capacity credit. TOU method is introduced in the IEEE-RTS79 system with photovoltaic generation to simulate the probabilistic production. And the reliability of the system before and after using TOU method is evaluated with taking into account of stochastic fluctuation of load and PV output. Then the reliability indicator is calculated with sequential Monte Carlo algorithm, and PV capacity credit is obtained with secant method. The result verifies the effectiveness of TOU method on improving PV capacity credit.