升降班制度（英语：Promotion and Relegation），是体育赛事中常见的联赛系统制度。目的是按照参赛队伍的表现来将他们分开不同组别，令每个组别的队伍的水平拉近，增加赛事竞争性及可观性，亦能减少强弱悬殊令赛事可观性大减的机会。升降班制度在足球联赛中尤其常见，球队会按照完季的名次而决定升降班资格谁属，以英格兰足球联赛为例，他们的职业组别分为四组，分别为首两级、独立经营的英超及英冠，以及第三及第四级的英甲和英乙，在英超和英冠的每个球季都各自有三支球队升班和降班，而英甲则有四支，从非联赛的英议联至英乙则有两支。

In sports leagues, promotion and relegation is a process where teams are transferred between two divisions based on their performance for the completed season. The best-ranked team or teams in the lower division are promoted to the higher division for the next season, and the worst-ranked team or teams in the higher division are relegated to the lower division for the next season. In some leagues, playoffs or qualifying rounds are also used to determine rankings. This process can continue through several levels of divisions, with teams being exchanged between levels 1 and 2, levels 2 and 3, levels 3 and 4, and so on. During the season, teams that are high enough in the league table that they would qualify for promotion are sometimes said to be in the promotion zone, and those at the bottom are in the relegation zone (or, colloquially, the drop zone or facing the drop).