Durability of reinforced concrete structure depends on the quality of the concrete cover that inhibits the rebar corrosion in concrete. Hence, for evaluating the performance of concrete cover to resist the rebar corrosion in concrete, authors proposed “Drill-PR method” using the permeability velocity and resistivity measured by the hole drilled in the surface of concrete. In this paper, several kinds of concrete were prepared for an experimental study on the application of Figg’s intrusive method and resistivity test method (Wenner method) to the Drill-PR method. The Student’s t-statistical analysis of the test results indicates a good capability of the air-permeability by Figg’s intrusive method for evaluating the performance of concrete cover to resist the rebar corrosion. It was also known that the resistivity test method was significantly affected by the water cement ratio, moisture content of concrete and relative humidity. Based on the results of these experiments, authors proposed a classification for the performance of concrete cover to resist the rebar corrosion in concrete.