On one side of the ladder, there is a triangular wheel designed to easily climb and descend the stairs, and a locking design is made on the shaft. When handling tools or materials, turn the knob switch to the rotation position, and the baffle will be erected to serve as a small cart. Additionally, hooks will be designed on both sides of the ladder to secure the material with ropes to prevent slipping, making it safer to move up and down stairs. When using a ladder to climb, turn the knob switch to the locked position, open the miter ladder to adjust to a safe angle, and use it normally. When workers step on the upper position, the extended handrail on the upper part of the ladder can make work safer.