A tuning algorithm of digital controllers to the objects’ models with inertia and time delay using the maximal stability degree method of the continuous control system is proposed in this paper. The objects’ model is a model with inertia (second or third order) and time delay. The controller represents a digital algorithm – PI, PID quasicontinuous and it is tuning in two stages. On first stage the PI, PID controllers are tuning in conformity with the maximal stability degree method of continuous control system. On second stage the discretized PI, PID controllers are tuning as the quasicontinuous controllers choosing initial the discretization period in conformity with the constant of inertia and time delay of objects’ model.