A service provision quality control device according to the present invention includes a simulation processing unit which predicts a group of state predicting vector values on the basis of vector values of a current state and a past state of measurement statistic, a judging unit which judges whether a control operation is necessary or not on the basis of the state predicting vector value and a target state vector value whose control target is agreed service level, and an adjusting unit which adjusts evaluation condition of an execution environment repeatedly until control deviation becomes not larger than a predetermined value under the condition that iteration number is not larger than a predetermined value which is corresponding to an upper limit value.