The invention discloses an intelligent office chair system and a prompting method thereof. The intelligent office chair system comprises a seat plate and a back plate, wherein a connecting plate is mounted at one end of the seat plate; the back plate is mounted at the top end of the connecting plate; a back cushion is mounted at one end, close to the seat plate, of the back plate; a lying pillow matched with the back cushion is mounted at one end, close to the seat plate, of the back plate; a vibrator is arranged in the lying pillow; a seat cushion is mounted at the top end of the seat plate;a pressure sensor is embedded in the seat cushion; supporting rings are symmetrically mounted on the front side and the rear side of the top end of the seat plate; supporting plates are fixedly mounted at the top ends of the supporting rings; and a controller is embedded in the top end of the supporting plate. According to the chair system, the controller are matched with the pressure sensor and the vibrator to remind an office staff to have a rest, so that the office staff can lie on the back plate; the vibrator is started through the controller to carry out neck massage and rest; and the office staff can directly stand up and take a walk for relieving the body, so that the office staff can take a rest in time, the neck fatigue is prevented, and the neck safety of the office staff is protected to the largest extent.