The invention provides a pair of dual indoor-outdoor slippers, and the pair of dual indoor-outdoor slippers consists of upper right male buckles, fixed buckles, female buckles, upper left male buckles, male and female buckles and wide heel straps, wherein fixed buckles (which can only rotate but cannot be removed) are respectively fixed with the wide heel strap at one sides of the uppers of a pair of common type slippers, the female buckle are respectively fixed at the other sides of the wide hell straps, the male buckles are respectively fixed at the parts, which respectively correspond to the female buckles, of the uppers, and when the female buckles are buckled with the right male buckles in a superposing manner, the pair of slippers is used indoors: the wide heel straps are rotated to enable the female buckles to be superposed with the other sides of the uppers, but the male buckles are respectively fixed at the superposed parts of the uppers, and when the female buckles are buckled with the left male buckles in the superposing manner, the pair of slipper is used outdoors. Consequently, the pair of convenient dual indoor-outdoor slipper is produced.