Abstract: This thesis integrates the provisions on the preservation of evidence in the main countries and areas belonging to the civil law family, and discusses the attribute of the preservation of evidence. On the basis upwards, the thesis criticizes the modus operandi that notarial organs carry the preservation of evidence into execution, and demonstrates the need to regulate preservation of evidence conducts ante litem motam in civil procedural law, then analyses the conditions to apply to preservation of evidence, finally demonstrates the effectiveness of preservation of evidence.