The AMoRE (Advanced Mo-based Rare process Experiment) intends to find an evidence for neutrinoless double beta decay of Mo-100 by using a cryogenic technique with molybdate based crystal scintillators. The crystals, which are cooled down to 10~20 mK temperatures, are equipped with MMC-type phonon and photon sensors to detect both thermal and scintillation signals produced by a particle interaction in the crystal to achieve high energy resolution and efficient particle discrimination. The AMoRE-pilot experiment with an array of six 48deplCa100MoO4 crystals with a total mass of about 1.9 kg was performed at the 700-m-deep YangYang underground laboratory and AMoRE-I preparation is in progress with ab ~ 6.1 kg of crystals, mostly 48deplCa100MoO4 and several R&D crystals such as Li2100MoO4 crystals. Significant improvement of effective Majorana neutrino mass sensitivity at the level of inverted hierarchy of neutrino mass, 20-50 meV, could be achieved by the AMoRE-II with 200 kg of molybdate crystals at the new 1,000 m deep underground laboratory excavated by the end of 2021 in the Yemi. Results of the AMoRE-pilot and status of the AMoRE-I and AMoRE-II preparation will be presented.