An apparatus for securing and supporting a mobile electronic device, comprising: a protective shell for mounting the mobile electronic device, the protective shell comprising a first connector, wherein the first connector having a first magnet; and a support for fixing to a supporting surface, the support comprising a second connector, wherein the second connector having a second magnet; wherein the protective shell and the support constitute a detachable connecting structure; wherein exposed ends of the first magnet and the second magnet having opposite magnetic poles; characterized by the fact the first connector being a female connector and further comprising a slot, a fastening end and a starting end opposed to the fastening end; and wherein the second connector being a male connector and further comprising a fastener, the size of the insertion end of the second connector corresponding to the size of the slot; wherein the first magnet is disposed at the starting end, and the sizes and placements of the first and second magnets correspond each other; such that when connecting the first and second connectors, the second connector is brought in proximity with the first connector, allowing the first and second magnets to attract each other, guiding the second connector to align with the first connector for inserting into the starting end and drawing the second connector to slide into the first connector along the slot, then the fastener of the second connector is fastened to the fastening end of the first connector, and the first and second connectors are locked together, and when detaching the first and second connectors, the fastener is firstly loosened, then the second connector slides outward away from the first connector, and the second magnet is attracted to the first magnet so that the second connector is returned to the starting end of the slot, and finally the second connector is pulled out form the first connector. a protective shell for mounting the mobile electronic device, the protective shell comprising a first connector, wherein the first connector having a first magnet; and a support for fixing to a supporting surface, the support comprising a second connector, wherein the second connector having a second magnet; wherein the protective shell and the support constitute a detachable connecting structure; wherein exposed ends of the first magnet and the second magnet having opposite magnetic poles; characterized by the fact the first connector being a female connector and further comprising a slot, a fastening end and a starting end opposed to the fastening end; and wherein the second connector being a male connector and further comprising a fastener, the size of the insertion end of the second connector corresponding to the size of the slot; wherein the first magnet is disposed at the starting end, and the sizes and placements of the first and second magnets correspond each other; such that when connecting the first and second connectors, the second connector is brought in proximity with the first connector, allowing the first and second magnets to attract each other, guiding the second connector to align with the first connector for inserting into the starting end and drawing the second connector to slide into the first connector along the slot, then the fastener of the second connector is fastened to the fastening end of the first connector, and the first and second connectors are locked together, and when detaching the first and second connectors, the fastener is firstly loosened, then the second connector slides outward away from the first connector, and the second magnet is attracted to the first magnet so that the second connector is returned to the starting end of the slot, and finally the second connector is pulled out form the first connector.