The present invention provides a method for controlling the conversion of feedstock with highly changeable carbon content into a gas with a basic consistent characteristic, and comprising: providing a facility used for converting the feedstock with highly changeable carbon content into gas with a basic consistent characteristic according to a comprehensive process; sensing multiple operating characteristics each of which represents one or more comprehensive processes, local processes, and area processes; generating one or more control parameters by using one or more computing platform according to the information indicative of the multiple operating characteristics; controlling the comprehensive processes, the local processes, and the area processes by using multiple responded elements associated with one or more computing platforms in a communication manner at least partially based on the one or more control parameters; and representing the one or more of the multiple operating characteristics by using a digital characteristic value.