On the basis of Three Link Theory model concerning solar energy utilization for light

heat

and electricity conversion

the exergy economics analysis of solar energy utilization for light

heat

and electricity conversion has been carried out

and comparison with the exergy economics of conrvenetional thermal power-generation being made

and the concept of exergy price and enrironmental cost for unusual shortage of fossil energy being put forward.And the influence of design parameters for focussing type solar energy heat collector upon unit output exergy price Cu of the said solar energy utilizing system has been discussed.