Abstract:This paper studies 15 types of sky light distribution based on a typical sky light environment defined by CIE. The sky light environment simulation algorithm system integrates the solar position simulation algorithm, the sky brightness distribution simulation algorithm, the sky light color temperature distribution simulation algorithm, and the sky light absolute zenith brightness simulation algorithm. The necessary inputs of the typical sky light simulation algorithm system include sky light mode selection, local longitude and latitude, local time, the output is sky brightness distribution and sky light color temperature distribution, and provide the input of sky light board brightness, sky light board color temperature and solar simulator brightness for the sky light environment simulation system device.