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Due to high-rise residential buildings and extension of balcony, to resolve discomfort of indoor-environment and the problem which energy consumption increases, high-rise residential buildings, coming natural ventilation and decreasing expense of an air-conditioning system., enable envelope system to be developed. The object of this study is to present the improvement on envelope of high-rise residential buildings to reduce heating and cooling load. To improve the environmental performance of envelope, it is necessary to modify envelope vent system and ensure intermediate space. In this study, the shape of vent in high-rise residential buildings has been inspected, and the survey about the environmental conditions related to the envelope of high-rise residential building has been conducted. Environmental measurement has been done to examine out door air quality for natural ventilation