Carpet, as a piled and knotted hand-woven with a structure consisting of organic materials, is always exposed to damages during the various time processes of weaving, consumption, and storage. These can generally be divided into two categories of internal damages (how primary actions for preparing and dying fibers and also knitting are done) and external ones (defects during use and maintenance). Considering that the scope of the attitude is more on the samples in the museum and private collections, which apart from the aspect of consumption need favorable conditions for long-term protection, in this research, we tried to describe the four harmful factors and their sub-categories, which includes physical factors (light, atmospheric pollution and two factors of temperature and humidity), chemical factors (effect of acids, alkalis, oxidants), macroscopic biological agents (insects and rodents) and microscopic ones (fungi, molds and bacteria), to create a wider insight into the process of keeping these exquisite objects and prevent them from entering the structure.