The existing heliostats have the disadvantage of poor stability in extreme weathers. To solve this problem

a three-axis supporting heliostats is proposed. The optimal positions of the three supporting poles are ascertained by using the finite element method. The height angle and azimuth angle of the sun are deduced according to the geographical position and time

and combining with the law of reflection

the optimum spatial angle for controlling the plane of the heliostats is obtained. Based on optimizing the arrangement of the position of the support shafts

the given value of the height control of the support shafts is deduced

and the corresponding control system is designed. Finally

by taking the actual data of a tower type solar-thermal power station as the example

the verification experiment is carried out

and the results show that the heliostats control system presented in this paper is correct and feasible.