A control method of a light-emitting device, including the following steps: setting a suitable light dose range (1~4J/cm 2 ) according to the light receiving part under the skin surface； according to the set light dose, light receiving time, and the light source to the skin surface Calculate the ratio of the shape change of the light beam between an ideal light intensity range of the light source； establish the corresponding relationship between the ideal light intensity range and the ideal skin surface illuminance range of the corresponding skin table； the skin table can be measured in production. And the light intensity of the light source is monitored by the skin light intensity to ensure that the light intensity output by the light source is the ideal light intensity set by the target. In this way, by controlling any illuminance of the skin surface illuminance within the set illuminance range, the light dose delivered by the light-emitting device to the light-receiving part can be maintained at the set light dose.一種發光裝置的控制方法，包含下列步驟：依皮表下的受光部位設定一合適的光劑量範圍(1~4J/cm2)；依據所設定的光劑量、受光時間、及該光源至皮表之間的光束之形狀變化的比例計算光源的一理想光強度範圍；建立理想光強度範圍與對應皮表的一理想皮表光照度範圍的對應關係；生產上可測量皮表的一皮表光照度；並由皮表光照度監測光源的輸出光強度，以確保光源所輸出的光強度為目標設定的理想光強度。藉此，只需控制皮表光照度在設定的照度範圍內的任一光照度，即可讓發光裝置傳遞到受光部位的光劑量維持於所設定的光劑量。
