The certainty of justice should be what it should be and judicial practice is a dynamic process. In judicial practice, the judicial result is often uncertain due to the influence of some uncertain elements like fact finding, the rule of law, legal interpretation, legal reasoning and so on. In order to overcome these uncertainties and ensure the predictability of the judiciary results, we should improve legislation and establish the concept of "legal reality" case facts, cultivate judges their common professional ethics and professional knowledge.