Providing a quick and simple approach to estimate the uniaxial strength of concrete plays a fundamental role in most of today's building construction projects. Using the uniaxial strength is a prevalent method for determining the compressive strength of concrete. The present thesis was attempted to provide a non-destructive method of surface drilling on concrete and shotcrete. The proposed method was able to provide strength parameters such as angle of internal friction and adhesion, by using a proper analytical model based on the limit equilibrium of the forces acting on the drilling process. Strength parameters were based on using drilling data (including the force behind the drill, torque, penetration rate and drill speed) from the device made at Isfahan University of Technology (IUT, Isfahan, Iran). The impact of more parameters such as the crushed zone and contact friction in the drilling process are the advantages of the analytical model used in this study, which leads this model to be a more comprehensive design than the previous models. The method was performed on the rock, and all the results were highly accurate. In this study, the feasibility of the presented method was investigated and its accuracy was measured on the basis of uniaxial conventional testing, besides developing a method for shotcrete and concretes with a maximum size of 0.6 to 12.5 mm. The results showed that the accuracy of the method is high and its error is estimated to be less than 10%, just when the drill is applied with a suitable diameter. In the surface drilling method, a few holes were created at a depth of about 25 mm at the concrete surface, and at a suitable distance from each other. Then concrete and shotcrete strength parameters were calculated, considering the data obtained from drilling operations such as the force behind the drill, torque, penetration rate, and drill speed, as well as using a linear fitting. The method can be used as a non-destructive means for determining strength parameters such as adhesion, the angle of internal friction, and ultimately the uniaxial strength of concrete, because of its high precision. Key Words shotcrete, concrete, non- destructive method, drilling, uniaxial strength