The invention relates to a sensitive factor database construction method and a sleep aiding system using a sensitive factor database. An existing sleep aiding system has the defects of being low in judgment accuracy and long in detection time when used for judging sensitive factors. The sleep aiding system comprises a basic data collector, the sensitive factor database, a processor and sleep aiding equipment. Through the pre-constructed sensitive factor database, the time and steps for a user to obtain the sleep sensitive factor information are shortened, the accuracy of the sleep sensitive factor information is effectively improved, it is ensured that the sleep aiding system plays a role in assisting the user in effectively shortening the sleep time, the sleep quality is improved, the user does not need to wear the data collector for a long time, the time for obtaining the sleep sensitive factor information is effectively shortened, the whole sleep process of the user does not need tobe detected, the obtaining steps are effectively simplified, and the use experience is improved.