A cell culture monitoring system includes measuring units housed in an incubator and each equipped with an indicator, the measuring units each measuring a state of cells in a culture container mounted therein; and an administration unit. The administration unit includes a receiver that receives, from each of the measuring units, a state of the cells measured, the state being associated with identification information of the measuring unit; an analyzer that analyzes the state of the cells and computes information indicating a culture state; a storage that stores, in association with each other, the information indicating the culture state and the identification information; a display that displays, in association with each other, the information indicating the culture state and an identification based on the identification information; and a controller that controls the indicators so that each of the indicators displays the identification corresponding to the identification displayed on the display.