A parking station system configured to be installed in a parking station (A1,A2,A3) for electrically assisted bicycles each including an electric motor for assisting a pedal force applied to a pedal, and a battery which can be attached to and detached from a bicycle body for supplying electronic power to the electric motor, the parking station system comprising: a plurality of locking devices each configured to lock one of the electrically assisted bicycles; a first detection device configured to detect that the bicycle is placed in the parking station (A1,A2,A3); a second detection device configured to detect that a detection object is proximate to the second detection device, where the detection object is the battery or an accessory of the battery; a notification device configured to generate a guidance as a battery detachment notification when the first detection device detects that the bicycle is placed in the parking station (A1,A2,A3); and a control device configured to generate the battery detachment notification by driving the notification device and configured to stop the notification device from generating the guidance when the second detection device detects the detection object is proximate to the second detection device as a first condition, wherein the control device is configured to stop the notification device from generating the guidance when at least one of the first condition and a second condition which is different from the first condition is satisfied, wherein the second condition is related to a period where the battery detachment notification is generated by the control device, characterised in that the second condition is that a predetermined time elapses from a point of time when it is detected that the bicycle is placed in the parking station, alternatively the second condition is that a period in which the battery detachment notification is generated goes beyond a predetermined amount of time, alternatively the second condition is that a user or an administrator executes a predetermined operation to the control device, the control device stops the battery detachment notification. a plurality of locking devices each configured to lock one of the electrically assisted bicycles; a first detection device configured to detect that the bicycle is placed in the parking station (A1,A2,A3); a second detection device configured to detect that a detection object is proximate to the second detection device, where the detection object is the battery or an accessory of the battery; a notification device configured to generate a guidance as a battery detachment notification when the first detection device detects that the bicycle is placed in the parking station (A1,A2,A3); and a control device configured to generate the battery detachment notification by driving the notification device and configured to stop the notification device from generating the guidance when the second detection device detects the detection object is proximate to the second detection device as a first condition, wherein the control device is configured to stop the notification device from generating the guidance when at least one of the first condition and a second condition which is different from the first condition is satisfied, wherein the second condition is related to a period where the battery detachment notification is generated by the control device, characterised in that the second condition is that a predetermined time elapses from a point of time when it is detected that the bicycle is placed in the parking station, alternatively the second condition is that a period in which the battery detachment notification is generated goes beyond a predetermined amount of time, alternatively the second condition is that a user or an administrator executes a predetermined operation to the control device, the control device stops the battery detachment notification.