In this paper, exergy, exergoeconomic, and Exergy Cost Sensitivity analyses of a cogeneration Solar power plant cycle and a parametric study were carried out Based on the Exergy cost theory .The mathematical models were developed and presented regarding mass, energy, exergy, and economy. The thermodynamic properties and research analyses are done by employing the THERMAX, EXCEL and MATLAB SIMULINK software packages. The analyses lead to have valuable economic status benchmarks. Sensitivity and parametric analyses confirm that the exergoeconomic factor, total annual plant cost, and unit cost of the work and steam, increase with the rise in the interest rate, while they decrease with increasing the annual number of working hours. Results from solar direct steam generation analysis, however , show The exergoeconomic factor behavior is calculated for January and July with value 0.64 and 0.34 respectively. and The total cost 3010.4and 5480$/hr respectively. It’s a valuable achievement to have determined values and clear parametric influences that could be of great assistance to the site engineers and operators to effectively establish their unique jobs, while playing with the conflicts of the use of energy, exergy, and cost.