The invention relates to the field of electric car charging, in particular to a mobile charging method and device for an electric car. The method is completed by establishing a
functional module structure and controlling a computer
system through
computer program instructions, wherein the
computer program instructions are stored in a computer readable storage medium. The method particularly comprises the following steps of positioning
signal sending, wherein a positioning
signal of the electric car is sent to a mobile charging car being closest to the electric car; seeking and charging, wherein the mobile charging car automatically seeks the electric car according to the positioning
signal and charges the electric car. When the electric car needs to be charged, the electric car only needs to send out the positioning signal to the mobile charging car being closest to the electric car, and the mobile charging car can automatically drive to seek the electric car and charge the electric car; the electric car is fixedly connected with the mobile charging car in the charging process, and therefore the electric car still can normally drive even under the charged condition without spending a large amount of time for waiting for charging to be completed.