The purpose of this investigation is to examine the relationship between the consciousness of energy-saving and life styles as well as a housing program. The investigation items were the consciousness towards energy-saving and the environmental protection, life styles and so on. The results are as follows : 1) Those whose energy-saving consciousness is higher, often adopt the ideas connected with energy-saving and protecting the environment when they began to have their houses constructed. They depend on air-conditioning as little as possible and try to live in the natural environment as much as possible. 2) Those whose energy-saving consciousness is higher, conserve electric and gas energy consumption throughout the year. The key to energy-saving is to conserve electric and gas energy consumption during seasons when people consume much energy. 3) The enhancement of energy-saving consciousness is considered to contribute to effective the environmental protection. 4) By contriving and putting effective devices into practice, the consciousness of energy-saving is enhanced and it motivates other similar activities. 5) It was also shown that the effectiveness of activities of the residents' association.