Abstarct: Solar energy is a clean and renewable energy that attracted much attention as an alternative to fossil fuels in this regard. Solar thermal power plants are one of the methods of using solar energy, unlike the fossil plants of this The power plant often shows higher or lower thermal loads from their design point, which results in operating conditions outside the design point in most of the time. The same factor causes the power plant output parameters to change in different days of the year, in this The research analysis of energy and exergy analysis of a solar power plant with Rankin cycle and absorption refrigeration cycle. Also, in this study, instead of using the usual heat transfer fluid, commonly used nitrate salts, the main difference of ionic fluids is the main difference of these two The type of fluid is that ionic liquids are fluid at room temperature, but nitrate salts usually have a melting temperature above 200 ° C. The same factor causes the range of applications to be limited in terms of temperature and in addition to the protective system to prevent salt freezing Nitrate needs In ionic fluids that are in liquid room temperature do not need such a system, with the fact that the freezing temperature of these fluids is less than the room temperature, these fluids can be used in the process of cooling or heating, in this research a power plant. Solar thermal recipient along with two energy storage tanks, Rankin cycle is used to produce power and absorption refrigeration system for air conditioning. In this research, the fluid temperature of the input heat and output heat transfer to the fixed Ranin cycle is considered, according to The thermal load varies to the cycle throughout the day, and in our research, the temperature factor is restricted so the fluid fluid transmission of the input and output heat transfer to the Rankin cycle varies, which shows the most efficiency in the initial conditions for solar radiation of 900W/m2, in the research, energy analysis and exergy cycle will be desired.