The ESA space astrometry mission has a great potential of observation and discovery on the solar system objects. GAIA is due for launch in 2010 and the survey mission will last five years. In addition to accurate astrometry of about 1 billion stars, the mission will survey all solar system objects brighter than 20th magnitude, in astrometry and with multicolor photometry. Each object will be observed about a hundred times during the five year mission. It is expected that more than 500 000 asteroids will be repeatedly measured by the mission.