The Super Charm-Tau Factory is an electron-positron collider project in Novosibirsk with a peak luminosity of 10^35 1/(cm*s) operating in the center of mass energy range between 2 and 6 GeV. Longitudinal polarization of the electrons at the interaction region is foreseen in the project. The physics program of the experiment is devoted to the measurements of charm quark and tau lepton. It includes precision tests of the standard model in the electro-weak sector, QCD measurements in the non-perturbative region, and searches for the beyond standard model phenomena. Conceptual designs of the collider based on crab-waist technique and universal detector are developed and presented. The preliminary physics program of the project is considered. Progresses of the physics simulation and systems prototyping are given.