The invention discloses an automated testing system of a freezing point, a melting point or a crystallization point, comprising a heat insulation sleeve pipe, an air sleeve pipe, a sample filling test pipe, a platinum resistor temperature sensor, a collecting card, a temperature data display instrument and a PC terminal; the air sleeve pipe is arranged at the inner part of the heat insulation sleeve pipe; the sample filling test pipe is inserted to the air sleeve pipe; the platinum resistor temperature sensor is inserted to the sample filling test pipe; the collecting card is connected with the platinum resistor temperature sensor; the a temperature data display instrument is connected with the collecting card; the PC terminal is connected with the a temperature data display instrument. The system realizes the automatic detection of the freezing point (crystallization point and melting point) test; the test success rate is improved from 70% to 100%; two samples can be detected synchronously by one person, the analysis efficiency is improved by over 1 time, thereby providing technical support for releasing the contradiction between the saturated detection task and the intense human resource; meanwhile, the system removes the artificial bias of temperature collection; the measurement result uncertainty is better than the manual analysis; the measurement accuracy is improved.