"To host a successful Winter Games is China's solemn commitment to the Olympic Family," Zhang was quoted as saying by Xinhua.
Air pollution and a lack of natural snow remain concerns. Because there are no tall mountains in the Beijing area, the skiing and other outdoor events are being held far from the city center.
Beijing says hosting the games will hasten efforts to clean up the air and help promote winter sports among tens of millions of young Chinese. Organizers also say have the water supplies and technology to produce sufficient man-made snow for the events.
The International Olympic Committee said the establishment of the organizing committee marks a "major step" in Beijing's preparations for the games.
"Beijing is making history as the first city in the world to host both the Olympic Summer Games and the Olympic Winter Games," IOC President Thomas Bach said in a letter to the organizing group. "The formation of the organizing committee represents the start of an exciting journey for the entire Olympic family."