This research intends to analyze the implications of current adult guidance system from an angle of people with developmental disabilities in an sudden changed information age. Through it, this research intends to seek improvement of adult guardian system for people with developmental disabilities, a main group of the system, from an angle different from the aged. It focuses on significance and improvement for the significance of adult guardian system for people with developmental disabilities, which are weak for self-decision. Furthermore, for the improvements, this system should be able to be information exchange and communities through the using internet in the cyber space.