The present invention relates to a disposal cat toilet. A weight sensor (61) and an electronic device related to the same are embedded on a bottom unit (53) of the lower part (50) of an excretion container of the disposal cat toilet. A display unit (70) such as an LCD is attached on one side of the lower part (50) of the excretion container. A micom (65) receives sensed weight from the weight sensor (61). When a cat is stepped on the lower part (50) of the excretion container, the sum (weight 2) of the weight of an upper cover of the cat toilet, the weight of the lower part of the excretion container, the weight of sand, the minimum weight of the cat is measured by the weight sensor (61). The micom (65) is operated again if a value obtained by subtracting weight 1 from weight 2 is a preset value or greater and records. The micom (65) records time (date/ hour/minute to date/hour/minute) from when a measured weight is weight 2 to when a measured weight is weight 1 and saves the time which the cat is temporarily stayed on the lower part (50) of the excretion container. The display unit (70) displays the time saved in the micom.