Abstract--Metamaterials is a large family of artificial composite structures or composite materials that have some specific extraordinary properties which natural materials do not possess. Aerogel is one kind of them. Following a description of the properties and preparation technology of aerogel, this paper explores recent literature on the use of aerogel in the research areas of heat, acoustics, microelectronics, etc. This contribution is meant to provide an overview of their applications in architecture and space, etc.