A locker system includes a body, a driving unit, and a computer unit. The body includes a casing, a separating plate, horizontal plates, vertical plates and covering plates. The separating plate is disposed inside the casing to form an accommodating space and a storage space. The horizontal plates and the vertical plates are disposed inside the accommodating space and cooperate with the casing to form accommodating subspaces. Each covering plate is pivoted to the casing. The driving unit connects to the horizontal plates and the vertical plates. The computer unit obtains the size of an object. When the size of the object exceeds a preset size, the computer unit sends a driving signal to the driving unit, and the driving unit controls at least one horizontal plate or at least one vertical plate to move into the storage space according to the driving signal to accommodate the object.