Micromagnetic field measurement has shown significant application value in many scientific fields. However, existing instruments for physics experiments in university are relatively rigid, limiting students' opportunities to conduct further experimental exploration. By leveraging the amplification characteristics of Moiré fringes, the variation patterns of Moiré fringes under magnetic fields was observed and established a quantitative relationship between them, enabling micromagnetic field measurement based on Moiré fringe technology. Furthermore, by modifying the grating constant, the influence on the measurement results was investigated. The Image J software was utilized to collect and analyze image data, optimizing the micromagnetic field measurement system based on Moiré fringe technology. This measurement method offers the advantages of visualization, ease of operation, and straightforward equipment assembly, enables students to both understand the characteristics of micromagnetic fields and pursue extended research projects.