The effect of heat-treatment on catalytic crystallization in $LI_2O-Al_2O_3-SiO_2$ glass system over its glass transition temperature was investigated. Glass composition $4Li_2O{cdot}22AL_2O_3{cdot}66SiO_2{cdot}2TiO_2{cdot}2.5ZrO_2{cdot}1.5P_2O_5{cdot}1.0Na_2O{cdot}1.0As_2O_3$ (wt%) was selected and heat-treated at different heating conditions to obtain transparent glass-ceramic. Nucleation and crystallization behaviour of this composition were estimated by differential thermal analysis (DTA) and X-ray diffractometer (XRD) and its thermal expansion coefficients were measured by Dilatometer. As a result, glass transition temperature was $730^{circ}C$ and two maximum nucleation temperatures were estimated at $730^{circ}C$ and 82$0^{circ}C$ using JMA(Johson-Mehl-Avrami) equation by DTA. $ZrTiO_4$ $eta$-Quartz solid solution and $eta$-Spodumene crystals were identified by XRD. The optimum crystallization temperature was 92$0^{circ}C$ and three step heating schedule was expected to be useful to obtain transparent glass-ceramic.