Due to the industry, population and living level are growing up, the demand on electricity power is annually increasing at an amazing speed. In the developing countries, using coal to generate electricity power occupies a large proportion. Wherein, the coal gasification with low emission and high efficiency is recognized to be the most practical technology. In current practice, coal gasification produces hydrogen for various purposes from coal, water and oxygen. The investigation of what the optimal ratio is between input oxygen, vapor water and coal to the output response including the quality/density of hydrogen and slag is important. In this paper, the dynamic model of gasifier is established based on the mathematic formulae and by using the MATLAB simulators. Through this model, the simulation studies under the input perturbation to oxygen, vapor water and coal were completed. In addition, a PID controller based on the integration of the optimizers as the Taguchi’s method, PSO (particle swarm optimization) and multiple ANFIS(adaptive neuro-fuzzy inference system), is design to find out the optimal ratio. Through this proposed study, the energy transformation of gasifier is expected to be improved to maximize the hydrogen generation and minimize the slag.