Thermal treatment methods considering thermal characteristics of waste asbestos-containing was studied on the basis of the environmental and economical properties. To treat asbestos-containing wastes safely, the most important things for asbestos fiber are temperature-induced structural changes. Therefore waste boards of slate and plaster are intended for 1 hour heat treatment of the asbestos-containing waste at 800~1400℃ elicited optimal temperature and conditions. SEM/EDS, PLM and XRD was performed to investigate of the structural change of asbestos and heavy metals (Cu, Cd, As, Pb, Cr, Hg). And through the analysis of dioxins, slate and plaster tex was also proposed for the possibility of recycling plan.