In the framework of the described research is investigated how the energy demand of Passive-House buildings in Korea can be covered with renewable energy. The starting basis for the investigation is the reduction of the energy demand in domestic buildings in Korea by the adoption of the Passive-House principle to typical Korean residential buildings. This is done by the analysis and evaluation of specific climate conditions, architecture, building practice as well as specific comfort criteria. The energetically optimization of the buildings is based on the modification of common building designs. According to the research findings residential passive buildings can be realized in Korea with a relatively low additional constructive and monetary effort compared to the common building practice. For the calculation of the energy demand of the buildings for cooling, heating, hot water and electricity consumption two programs were used, the passive house development package PHPP 20007 and Primentor Korea. The remaining required energy demand for heating and hot water production can be covered completely by renewable energies. Solar-thermal collectors installed on the roof or in facades can provide the required thermal energy. In combination with heat pumps the required hot water storage volume as well as the surface area of solar-thermal collectors can be reduced. The required energy demand for electricity can be covered by photovoltaic systems. Therefore the required energy demand of Passive Houses in Korea can completely be covered by renewable energy.