In many kinds of underground engineering，the determination of the attitude of the rock structural plane is a necessary step. This paper has analyzed and summarized three types of methods, i.e., core orientation method, drilling method and geophysical logging method or well-television method as well as their main features. The solid geometric method for determining the attitude of the rock structural plane is put forward based on measuring the imaging values and well deviation parameters. Computer programming calculation is realized. Theory and experiments show that the calculation principle of the method is correct, simple and accurate.