A tent system including: a fabric member including a body portion and a bottom portion to form a resident space; a fixing device disposed at the fabric member and including a mesh pocket, an upper clip, a lower clip and a side clip; a main pole coupled to the fabric member in an X-shape through the fixing device, in which one end and an opposite end of the main pole are supported by the mesh pocket and the lower clip, respectively; and an adjusting device that allows at least one of the fixing device and the main pole to have a variable structure. The tent is easily installed and disassembled even by one person with a simple structure and maintains a tight supported state to the ground, so that usability is improved in cost-effectiveness.