The term maintenance includes all activities used to keep a system in good condition. Using a variety of maintenance strategies and models, companies choose their own way of maintaining their facilities. The aim of this paper is to describe the methods of maintenance, enumerate strategies and present the principle of maintenance of CO₂ laser cutters in a manufacturing company. The introductory part of the paper defines the concept of maintenance and its meaning in industry. The development and division of maintenance strategies are described, features, maintenance technologies as well as the impact of information systems are defined. The technology of laser cutting is described, and the basic components of a CO₂ laser cutter are listed and defined. In the last, practical part, the annual service procedure on the laser cutter was followed in detail. Special attention is paid to each step during service and technical documentation of the machine with recommended intervals of regular and preventive maintenance by the manufacturer.