The invention relates to a steel structure correcting and lifting system and a construction technology thereof. The steel structure correcting and lifting system comprises a supporting base plate, supporting push rods, a placing plate, rotary rollers, a position adjusting device and a positioning device. The supporting push rods are uniformly mounted on the top of the right side of the supportingbase plate, the placing plate is installed on the tops of the supporting push rods, a square groove is formed in the middle of the right end of the placing plate, and rotary rollers are symmetricallymounted at the front and rear ends of the top of the placing plate. The position adjusting device is mounted on the top of the right side of the supporting base plate, and the positioning device is mounted on the top of the left side of the supporting base plate. The steel structure correcting and lifting system can solves the problems that when an existing steel structure stair is mounted, stairplacing angles need to be corrected manually, the manual moving of a steel structure stair is more difficult, the steel structure stair is lifted with human assistance, the stair cannot be fixed whenlifting the steel structure, a stair lifting angle cannot be controlled automatically, and wounding hidden danger happens when the stair is lifted.