Purpose. The purpose of the work is to analyze the modern methods of control and determine the most effective ones for monitoring the state of grounding of existing energy objects in operation. Methodology. The analysis of the methods was carried on the basis of comparison the experimental and calculation methods for determining the rated parameters of the grounding of existing energy objects. Results. Significant imperfections of measurements of the rated parameters of the grounding with different methods and devices was established. It has been shown that the electromagnetic diagnostics is the most complete, which allows to comprehensively assess the current state of the grounding and establish the resistance of the grounding, the voltage on it, the touch voltage and the resistance of the contact joints. The deficiencies of electromagnetic diagnostics are established at the present stage and further directions of its perfection are determined. Originality. For the first time the comparative analysis of existing methods for monitoring the state of the grounding and directions for improving electromagnetic diagnostics was made. Practical value. The obtained results allow to choose the optimum method for monitoring the state of the grounding. Elimination of the revealed drawbacks of the method of electromagnetic diagnostics will improve the accuracy of the determination of rated parameters.