Progress of theoretical research on the H-mode physics is reviewed. The topics cover the study on elementary processes, i.e., the bifurcation physics, collisional transport theory and anomalous transport theory. Associated with these investigations, theory has constructed a global picture of the H-mode phenomena, such as the spatial structure and temporal evolution. This summary tries to clarify the contributions of the theoretical presentations in this H-mode workshop, illustrating the relation to the over-all progress on the H-mode theory.