In this talk, aspects and examples of the sustainable technologies for human and the earth will be presented. The first example is a robotic wheelchair with inverted pendulum control by which a wheelchair-bound person can climb over a step without external assistance. The robotic wheelchair raises its front wheels in front of a step and maintains the inverted pendulum control to go forward and backward using the user’s body inclination. After the front wheels land on the step, the robotic wheelchair can climb over the step, assisted by DC motor force. The experimental results focus on the step climbing control and the human psychological flutter. The next example is a self-transfer aid robotic system which assists people with impaired walking ability. With the aid transfer, these users can maneuver themselves independently to carry out daily necessities. In practice, users lean their upper-bodies onto the saddle of a robotic arm, which lifts and transfers them to their destination. Our results have confirmed that this self-transfer aid robotic system can lift a human body gently and more efficiently. The third example is a low cost, small fuel cell vehicle with reduced carbon dioxide emissions. Our design is based on the rules of the Japanese light weight electrical vehicle competition, ECONO MOVE, held every year in May in Akita prefecture, Japan. In this competition, each vehicle is evaluated based on its running distance while using two 60 NL hydrogen tanks over a two hour period. We will detail the vehicle concept and fuel cell driving system. Finally, we will provide the experimental results of the improvements of the fuel cell driving system and the efficiency of the hydrogen flow rate of the system.