Over the last three decades, great progress has been achieved in the development of discontinuum-based numerical methods such as the key block theory, the distinct element method (DEM), the discontinuous deformation analysis (DDA), and the manifold numerical method (NMM). Nowadays, the discontinuous deformation analysis approaches are providing promising solutions for rock engineering problems and a new era of numerical modeling in rock mechanics and rock engineering is coming. Since the first conference in 1995, this global academic event, namely the International Conference on Analysis of Discontinuous Deformation (ICADD), has held eleven times and the latest one ICADD-11 in Fukuoka, Japan received overwhelming response. Herein, we are proud to announce the ICADD-12 which will be held in 2015 in Wuhan, China. ICADD-12 continuously aims to exchange ideas, knowledge and experiences on various discontinuous deformation analysis methods, and to welcome new advances and developments of discontinuum-based numerical methods in rock mechanics and rock engineering. ICADD-12 will be a milestone event to review the progress in the past 30 years since 1995 and look forward to the future development of the discontinuous deformation analysis methods. We would like to invite colleagues in the numerical modeling and rock mechanics community to join this upcoming great event, to celebrate and to anticipate the progress of discontinuous numerical methods.