O1-Journey is a project initiated by the GAIR research group at Shanghai Jiao Tong University, aimed at replicating and reimagining the capabilities of OpenAI's O1 model. This project introduces a novel training paradigm called 'journey learning' and has successfully built the first model that integrates search and learning in mathematical reasoning. Through processes such as trial and error, correction, backtracking, and reflection, this model has become an effective method for tackling complex reasoning tasks.