According to the different effects of biological and chemical control, we propose a model for Holling I functional response predator-prey system concerning OREGANUM PLUS pest control which adopts different control methods at different thresholds.By using differential equation geometry theory and the method of successor functions, we prove that the existence of order one periodic solution of such system and the attractiveness of the order one periodic solution by sequence convergence rules and qualitative analysis.Numerical simulations are carried out to illustrate the feasibility Goalie - Pads - Junior of our main results which show that our method used in this paper is more efficient and easier than the existing ones for proving the existence of order one periodic solution.