Currently, most construction equipment is manually operated. In order to perform more efficient work, construction equipment needs to meet the operator's needs by adapting the machine to the worker based on various human conditions, such as sensitivity, skill, and fatigue level. Also, construction machine must be capable of promoting growth of operators. So far, work efficiency has been achieved by operators who adjust to the construction equipment even though they experience some difficulties to operate it. However, the number of skilled operators that can adapt to any kind of construction equipment is decreasing year by year. In this research laboratory, based on skills and fatigue levels, research themes such as "easy to operate", "hard to feel tired" and "can operate like a skilled operator" are being investigated.