The invention provides a method for evaluating a retaining wall in a display panel and a test system, and the problems of limitation, contingency, the lack of a theoretical basis for a result and highcost of environmental reliability evaluation can be avoided. The method comprises a step of clamping and fixing a display panel provided with a display area and a peripheral area, wherein a boundaryof the display area comprises a first edge, a second edge and a third edge, and the second edge and the third edge are connected to the first edge and are opposite, a step of detecting distances fromthe display panel by using multiple first laser detectors arranged at intervals in a direction perpendicular to the second edge, wherein the two first laser detectors located at the two ends in the multiple first laser detectors are used for detecting a distance from a point A to a point C of the display panel, and the point A is located between the second edge and the retaining wall close to thesecond edge, and the point C is located on a side which is at one side of the retaining wall close to the second edge away from the display area, and a step of obtaining information representing the blocking capacity of the retaining wall to cracks according to the detected distance to the display panel when the display panel is in a standing state and an edge of the display panel close to the second edge receives vibration energy.