The invention discloses a full-automatic concrete penetration resistance meter and a concrete setting time measuring method. A rotating platform is arranged on a base, and three measuring barrels are mounted on the rotating platform. An electro-hydraulic servo meter is mounted on the base. A slide is arranged on the electro-hydraulic servo meter, and a crane mounted on the slide moves up and down along the slide vertically under the drive of the electro-hydraulic servo meter. A displacement sensor is mounted on the crane. A support is mounted in the middle of the crane, and a tapered disc is mounted on the support. A resistance sensor is mounted on the lower portion of the tapered disc and is connected with the end of a rotary probe. The rotating platform, the electro-hydraulic servo meter, the displacement sensor, the tapered disc and the resistance sensor are connected with a microcomputer terminal processor. Automatic penetration of the rotary probe is achieved by the microcomputer terminal processor, so that observation time of experimenters is shortened, unnecessary troubles are reduced, and measurement accuracy of concrete setting time is improved.