Fuzzy AHP Method is applicable to estimate ergonomics of mobile maintenance shelter. Workload, usability and user questionnaire grade are selected to constitute alternative set. Comparison matrixes are constituted by pair-wise comparison according to Saaty1-9 scales. The relative weights between alternatives are determined by calculating the eigenvectors of comparison matrixes. Then fuzzy evaluation of every stage is carried out. According to maximum membership degree principle, the ergonomics evaluation grade is determined.