A dual-purpose safety baby carrier includes a seat having armrests and a bottom to which a cover defining a receiving chamber is mounted. Upper and lower positioning sections are mounted to a back of the seat. A control bar is movable along the upright tubes between a position where a push key of a safety switch engages the upper positioning section to allow a wheel frame carrying wheels to be retracted into the receiving chamber for serving as a safety seat and a position where the push key engages the lower positioning section to allow the wheel frame to be expanded to form a stroller. The safety switch also includes a push button biased by a spring for locking the push key in position of engaging the upper or lower positioning section. A securing structure includes coupling members mounted to the seat for coupling a seat belt.