Based on some chapters of the monograph ‘Geopedology’ published in 2016 and other related references, a review was presented in this paper of the concepts, methods, study status quo and future challenges from pedodiversity to geodiversity, with emphasis on study modes on pedodiversity and geodiversity. Firstly, the emergence and evolution of the concept from pedodiversity to geodiversity were introduced; Secondly, the study and exploration of the methodology form planar to linear based on the forms of geological factors were expounded, particularly of the feasibilities of Modified Shannon diversity area index (MSHDAI) and Modified Shannon diversity length index (MSHDLI); Thirdly, the major study models in pedodiversity and the geodiversity of main geo-factors (terrain, land use, parent material, water body and even vegetation) were analyzed; Finally, it was pointed out that from pedodiversity to geodiversity and the correlation analysis between geo-factors is growing well in accordance with the development trend and demand of soil geography study, but also face lots of challenges.