The sun is the source of phenomena in the solar terrestrial space environment, and ground-based solar observations have important scientific and educational value. The optical telescope is an effective observation equipment. This article introduces the construction ideas and methods of an optical telescope teaching experimental system, which has three functions: star searching and guidance, sun observation, and night sky photography. In response to the teaching needs of the course, 11 experiments were conducted, including observations of the solar sphere and chromosphere, imaging observations of the moon, observations of major planets (Saturn, Jupiter, or Mars) and imaging observations of galaxies, effectively improving the practical teaching effectiveness of the course.