陽光是所有生物生存與生長最重要也是最基本的條件之一，因為生活型態的改變，人類約有90% 的時間待在室內，室內人工照明幾乎取代了自然光，犧牲了全光譜自然光對健康的幫助，會感到精神無法集中、疲倦、骨質疏鬆和憂鬱症…等症狀，因此，本論文提出一個智慧型自然光照明系統為兼顧環保與健康照明之系統。此系統可分為四個子系統：集光、傳光、放光及補光。此系統是利用白天太陽光充足時，直接引導陽光進入室內做照明應用，並且透過補光子系統，以自然光為主，室內人工照明為輔，調整室內照度達到使用者需求照度，使室內能夠同步享受自然光，改善室內環境居住品質。

Sunlight is one of the important elements for creatures' survival and growth. Due to the change of lifestyle, people spend about 90 \% of time staying in buildings. In this situation, the artificial indoor illumination gradually replaces the sunlight in human beings' life. This condition may lead to exhaustion, osteoporosis, depression, inability of concentration, and other symptoms if people cannot be exposed to enough sunlight. To solve this problem, this dissertation proposes an Intelligent Natural Light Illumination System. This illumination system can take people's health and environmental protection into account. This system can divide into four parts: Light Collecting, Light Transmitting, Light Emitting, and Auxiliary Lighting. When the sunlight is enough, the lighting system can guide the sunlight into the building for lighting applications. The auxiliary lighting subsystem would control the LED to satisfy the users' demand when the brightness of the environment could not achieve the desired results. After that, it can let the sunlight indoors and improve the quality of human's life at the same time.

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