In order to solve the problems of difficult flexible peak regulation and renewable energy accommodation due to the obvious seasonal characteristics of power grid load, taking Chuxiong area of Yunnan Province as an example, a new solution of integrating the photovoltaic power generation and liquid air energy storage (LAES） system architecture is proposed, aiming to clarify the integrated planning concept of source-network-load-storage. Based on the typical climate conditions, photovoltaic output characteristics in different seasons and the historical data of electricity load in Yunnan, the models of short-term load peak shaving and long-term photovoltaic accommodation based on photovoltaic power generation and liquid air energy storage are established. Based on the simulation analysis of daily and seasonal power load peaking, the technical feasibility and economic benefit of short-term load peaking and long-term photovoltaic absorption are further verified. The evaluation results show that the photovoltaic power generation and liquid air energy storage system can reduce the power grid supply burden by 33.4% through daily load peak shaving, and the photovoltaic power discarding rate is expected to be reduced by 10.1% through seasonal long-term energy storage regulation. In the economic benefit evaluation of short-term load peak shaving and long-term photovoltaic accommodation, the average levelized cost of energy (LCOE） is about 0.47 yuan/kWh, and the static payback period (SPP） and dynamic payback period (DPP） can maintain at about 7.5 years and 10.5 years, which verify the economic feasibility of the proposed photovoltaic-LAES system effectively.