The samples were attained through altering the cooling system of producing glass-ceramics.The X-ray diffraction was used to test the stress value of different samples. The relation of the cooling system and intal stress were also investigated. The experimental results show that the stress of glass-ceramic had a close relation with starting cool temperature. Above 800 C, glass-ceramic could be accelerated cooling and did not bring stress. Temperature between 500 C and 800℃ was an important temperature range of the formation of stress in glass-ceramic, in which the glass-ceramic stress would change obviously. Cool system was the key on how to control and eliminate intal stress in order to reduce the destroy of materials crated by intal stress. In addition, glass particles size increase, glass-ceramic stress increase in consequent.