A charging system is configured to charge a charging target group including electronic devices which are stacked in a row and include their respective secondary batteries. A first receiver is configured to acquire, from the electronic devices, pieces of battery information representing remaining capacities of the secondary batteries, respectively. The second receiver is configured to obtain, from the electronic devices, pieces of position information representing positions of the electronic devices in the charging target group, respectively. The determining processor is configured to determine respective priorities of the electronic devices according to the pieces of battery information and the pieces of position information based on a judgment condition. The charge controller is configured to control charging of each of the electronic devices so that the electronic devices are charged according to the respective priorities.