为了评估温度对望远镜的影响，针对某地基光电望远镜，建立了包括光学组件，跟踪架结构以及电控设备等在内的有限元热模型.在传导、对流、辐射以及热流等不同热环境下进行热分析，计算了望远镜光机结构的时间和空间温度分布.根据温度分布进行了热-弹性分析，得出了望远镜结构的热变形.分析表明: 温度变化对望远镜跟踪架以及主光学系统的影响很大，对主次镜造成的相对位移达到毫米级，必须进行严格控制.最后从防护圆顶、跟踪架以及主镜等方面入手给出了热控设计方案.

In order to evaluate the temperature effect of telescopes, a precise thermal finite element model consists of telescope optical assembly systems, mount structure and electrical equipment was established. Temporal and spatial temperature distributions of the optical assembly and telescope structure were calculated under various thermal conditions including conductions, air convections，radiation and heat flux loading. Moreover, the thermo-elastic analysis was made to obtain thermal deformations of the telescope structure based on the resulting temperature distributions. The obtained results show that temperature variation has large effect on telescope mount and main optical system, and induced displacement between primary and second mirror has a magnitude of millimeter, so it must be controlled strictly. At last some thermal control ways were given in terms of protection dome, mount, primary mirror and so on.