Method for modernizing elevator system

The invention relates to a method for modernizing an elevator system. The elevator system comprises a first elevator comprising a first car in a first hoistway and a second elevator comprising a second car in a second hoistway. The method comprises: transporting passengers and/or goods between vertically displaced floors of the building using a first and a second car, stopping using the first elevator car, and installing a construction time elevator into a lower end of the first hoistway, wherein the travel area of the car of the construction time elevator only partially covers the height of the first hoistway; and then transporting passengers and/or goods between the vertically displaced floors of the building using the car of the construction time elevator and the second car simultaneously, during which use the method comprises performing a construction operation in the first hoistway above the travel area of the car of the construction time elevator. 本发明涉及一种使电梯系统现代化的方法，电梯系统包括第一电梯和第二电梯，第一电梯包括在第一井道中的第一轿厢，第二电