Characteristics of the luminous intensity spatial distribution (LISD) of light emitting diodes (LEDs) are capable of determining whether these devices can be applied on specific occasions. The absolute LISD of high power LED can be accurately measured only when LED is fixed at a specific heat- sink temperature because of the LED′s large heat-generating capacity. In this study, an automatic test system based on LEDGON-100 goniophotometer and the meter′ s high- precision two- dimensional (2D) revolving platform, is designed. In addition, it comprises of a test adapter, a temperature controller, a photometer head, a Keithley 2400 source meter, and an in- house- developed software package. This assembly can both control heat- sink temperatures and measure the LISD characteristics rapidly for high- power LEDs. The software is developed using Delphi programming language. The test system is stable and reliable. The test time is greatly reduced and measurements are instantly displayed.Two general types of LEDs, Lambertian type and batwing type, are measured by the system to obtain their 2D and three- dimensional (3D) LISDs. Experimental results show that the absolute luminous intensity decreases as the heat- sink temperature increases. However, the relative LISDs are the same under different heat-sink temperatures.