A stand device includes a base, a supporting component and a carrying component. The supporting component is pivotally disposed to the base along a first axis. The carrying component is pivotally disposed to the supporting component along a second axis, and slidably disposed to the supporting component in a first direction. The stand device is switchable between a first state and a second state. In the first state, the extending direction of the supporting component is parallel to the extending direction of the base, and the extending direction of the carrying component is parallel to the extending direction of the supporting component. In the second state, the extending direction of the supporting component is staggered to the extending direction of the base, and the extending direction of the carrying component is staggered to the extending direction of the supporting component.