In the former time, human tried to find a way to develop natural energy resources to contribute to a better living. Nevertheless, some sources such as fossil fuels and uranium are limited for supply and may be depleted soon. Obviously, if those energy sources are completely used up, people's lives will be vastly affected. It is important for humans to put their efforts to find the renewable energy sources. Wind power is one form of the energy that can be regenerated and facilitate humans in a variety of ways without causing pollution, generating hazardous wastes, or depleting natural resources. In particular, embracing wind energy today will lay the foundation for a healthy tomorrow. The paper will gather the definitions of wind and discuss the importance of wind power, the advantages and the disadvantages of wind power and the output power of wind.