A smart electric scooter turning multi-stage deceleration control system comprises a magnet, a fixing bracket, a first sensing unit, a second sensing unit and a control processor. The first sensing unit includes a first right sensing component and a first left sensing component, and the first right sensing component or the first left sensing component is sensed by the magnet to generate a first signal. The second sensing unit includes a second right sensing component and a second left sensing component, and the second right sensing component or the second left sensing component is sensed by the magnet to generate a second signal. The control processor performs deceleration of the first deceleration ratio or the second deceleration ratio according to the first signal or the second signal, and the electric scooter rotates in multiple stages without losing balance, thereby ensuring safety of the user.一種智慧型電動代步車轉彎多段減速控制系統，包含一磁鐵、一固定支架、一第一感應單元、一第二感應單元及一控制處理器。該第一感應單元包含一第一右感應件及一第一左感應件，通過該磁鐵感應該第一右感應件或該第一左感應件以產生一第一訊號。該第二感應單元包含一第二右感應件及一第二左感應件，通過該磁鐵感應該第二右感應件或該第二左感應件以產生一第二訊號。該控制處理器根據該第一訊號或該第二訊號進行第一減速比例或第二減速比例的減速，該電動代步車轉彎時是多段減速而不會失去平衡，確保使用者的安全。
