Abstract: Objective: Normalization of the appropriate extent of lymphadenectomy and number of metastasized lymph nodes ensures superior curative effects. Most studies related to variations in the classification of lymph node metastasis, extent of lymph nodemetastasis, and number of metastatic lymph nodes aim to draw conclusions for clinical applicability. 1) Classification based on the number of metastatic lymph nodes is the best classification of nodal metastasis for predicting gastric cancer prognosis; 2) Standard lymphadenectomy should be in accordance with D2 operation and include at least 15 dissected lymph nodes; 3) The number of negative lymphnodes is a new classification of nodal metastasis for the accurate assessment of the gastric cancer prognosis. We examined new viewpoints and evaluated the progress of studies that focus on the treatment and prognostic assessment of gastric cancer in this review