In the research to realize high standard task-oriented assistant robots, a general and strategic way of development is essential. Otherwise high functionality and potential for evolution of those robots cannot be achieved. Robotic systems are socially expected to assist our daily life in many situations. As a result, projects related to those robots are becoming large, involving many researchers and engineers of universities and companies. This motivated us a new strategy to construct robotic systems based on mother environment and humanoid specialization to keep developing and refining functional elements of robots in an evolutionary way. The mother environment is an entity that creates brains of humanoid robots, where various robotics function elements, libraries, middle-wares and other research tools are integrated. Then the brain of each robot is developed utilizing the functional elements in the mother. We call this process specialization of a humanoid. To enhance this specialization process, we introduce a generator, which realizes conversion of functions in the mother environment for the real-time layer. After the research of these specific robots, enhanced robotics functions are incorporated into the mother again. We call this process feedback. In this chapter, we present these ideas using concrete implementation examples in IRT projects[1], where several robots to assist our daily life are developed.