A method of automatically tracing urine in a toilet that includes S1: acquiring an image of an interior of a toilet bowl (comprising an image of urine or an image simultaneously showing the urine and a collecting and tracing member of the toilet) through an image sensor； S2: identifying the urine or simultaneously identifying the urine and the collecting and tracing member through processing the image； and S3: implementing tracing movement to the urine by the collecting and tracing member. The method may, optionally, include S4: repeating S1, S2 and S3 until the collecting and tracing member coincides with the urine in the image.
