Combustion and gasification of pulverized coal have been investigated experimentally for the conditions under high temperature gradient and CO 2-rich atmospheres with 5% and 10% O 2. Crushed coal samples were heated rapidly by a CO 2 gas laser beam to give a high temperature gradient of order 100°C s -1 in order to simulate radiation heat transfer conditions expected in coal gasification furnaces. The rapid heating is able to minimize effects of coal oxidation and combustion compared with previous studies with a TG-DTA that requires much longer time to heat up with oxidation effect. Moreover, coal-water mixture samples with different water/coal mass ratio were used in order to investigate roles of water vapor on the combustion and gasification. The experimental results indicated that coal weight reduction ratio or coal conversion ratio to gases follows the Arrhenius equation with increasing coal temperature; in addition, coal weight reduction ratio of the sample was increased around 5% with adding H 2O in CO 2-rich atmosphere. Furthermore, generations of CO gas and Hydrocarbons gases (HCs) were mainly dependent on coal temperature and O 2 concentration, however, those are also affected by chemical reactions including H 2O. Especially, reactions generating CO and HCs gases were stimulated at temperature over 1000°C in the CO 2-rich atmosphere with 5% O 2.