Maintenance system is a practical theory to guide the maintenance of small drying equipment. It can scientifically and objectively reflect the law of the maintenance of small dry equipment. It is a general understanding of the maintenance work of small dry equipment.

The maintenance of small dry equipment is determined by many factors. Such as the type of equipment, the workers' ability to work and the development of technology. Breakdown maintenance is the most common Maintenance system in the beginning of the industrial revolution. It will be maintain the equipment have some problems. This is a kind of passive maintenance.

In addition to breakdown maintenance and schedule maintenance are another way. These two methods are the most common method at present.