A centrally-controlled brake system (1) and a movable medical device having the system. The centrally-controlled brake system (1) comprises a base frame (11), at least one caster (12) mounted on the bottom of the base frame (11), a transmission main shaft (14), a brake assembly (13), and a transmission assembly (15). The brake assembly (13) is used for controlling rotation of the transmission main shaft (14). The transmission assembly (15) is connected between the transmission main shaft (14) and the caster (12). The brake assembly (13) comprises a pedal member (131), an elastic member (132), a brake connection rod (134), and a ratchet assembly (133). The ratchet assembly (133) comprises a ratchet block (1331) fixed on the base frame (11) and a ratchet pawl (1332) connected to the other end of the brake connection rod (134). The ratchet block (1331) comprises a sealed annular track groove. A first stop position and a second stop position are arranged in the track groove. The pedal member (131) drives the ratchet pawl (1332) to circularly move between the first stop position and the second stop position in the track groove along a single direction. The centrally-controlled brake system (1) can implement a function of braking by pedaling the pedal member (131) and the caster (12), and a function of releasing braking by again pedaling the pedal member (131) and the caster (12). The pedaling actions are simple and force saving.Linvention concerne un système de frein à commande centrale (1) et un dispositif médical mobile ayant le système. Le système de frein à commande centrale (1) comprend un bâti de base (11), au moins une roulette (12) montée sur la partie inférieure du bâti de base (11), un arbre principal de transmission (14), un ensemble de frein (13), et un ensemble de transmission (15). Lensemble de frein (13) est utilisé pour commander la rotation de larbre principal de transmission (14). Lensemble de transmission (15) est relié entre larbre principal de transm
