A connecting device adapted for connecting a multifunctional box with a vehicle multimedia system may be provided. The connecting device may comprise a shell for holding the multifunctional box having a first open end portion and a second end portion configured with an interface, via which the multifunctional box is electrically connected with the vehicle multimedia system in a releasable manner; a locking unit formed on at least a lateral side between the first open portion and the second end portion for releasably locking the multifunctional box; and a release unit formed on the shell to release the inserted multifunctional box when pressed. A vehicle comprising the connecting device may also be provided.