The ESAC Science Data Centre (ESDC) provides services and tools to access and retrieve science data from all ESA space science missions (astronomy, planetary and solar heliospheric). The ESDC consists of a team of scientists and engineers working together and in very close collaboration with Science Ground Segments teams. The large set of science archives located at ESAC represent a major research asset for the community, as well as a unique opportunity to provide multi missions and multi wavelength science exploitation services. ESAC Science Archives long term strategy is set along the main three axes: (1) enable maximum scientific exploitation of data sets; (2) enable efficient long-term preservation of data, software and knowledge, using modern technology and, (3) enable cost-effective archive production by integration in, and across, projects The author wants to thanks all the people from the ESAC Science Data Centre and the mission archive scientists who have participated to the development of the archives and services presented in this paper.