The present invention relates to a sterilization and disinfection system applied in an open space. More specifically, the sterilization and disinfection system applied in an open space comprises: a sterilizing lighting unit comprising an LED assembly which consists of a UV-A LED in the wavelength range of ultraviolet A and a UV-B LED in the wavelength range of ultraviolet B and is installed in an open indoor space, and allowing each LED to be individually turned on/off a sensing unit which is installed in the indoor space equipped with the sterilizing lighting unit and comprises a humidity sensing part to sense the humidity in the indoor space, a light sensing part to measure the brightness in the indoor space, or a human body sensing part to sense the motion of the human body in the indoor space and a control unit determining the flickering and lighting maintaining time of each LED. According to the present invention, a sterilization and disinfection process is not performed in a closed space, and various objects can be sterilized and disinfected in an open space by natural light using ultraviolet A (UV-A) and ultraviolet B (UV-B). Accordingly, an object to be sterilized covers a greatly wide range. In addition, the irradiation time of each ultraviolet LED and the intensity of applied light are controlled according to properties of an open space such as a bathroom, a kitchen, a bedroom, a porch, etc. so a high sterilizing effect is secured. Furthermore, ultraviolet rays are applied for a long period of time without being directly exposed to the human body, thereby securing greatly high sterilization and disinfection reliability without damaging a user.COPYRIGHT KIPO 2016본 발명은 공간 개방형 살균소독 시스템에 관한 것으로서, 보다 상세하게는 자외선 A파장영역대의 UV-A LED와, 자외선 B파장영역대의 UV-B LED가 조합된 LED 어셈블리가 개방된 실내공간내에 설치되어 각 LED가 개별적으로 점등되는 살균조명부와, 상기 살균조명부가 설치된 실내공간내에 설치되어 실내공간내의 습도를 감지하는 습도감지부 또는 실내공간내의 밝기를 측정하는 빛감지부 또는 실내공간내에서 인체의 움직임을 감지하는 인체감지부를 포함하는 센싱부와, 상기 센싱부에서 센싱된 값에 기초하여 상기 각 LED의 점멸 및 점등유지시간을
