The invention relates to a temperature sensor system comprising a first ceramic housing part comprising a sleeve-shaped lower part with a first lower end having a first opening, and a second upper end having a second opening, and an upper part connected to the second upper end. The temperature sensor system further comprises a temperature probe element which is at least partially arranged in the lower part and which has a ceramic sensor element housing, a sensor element arranged in the sensor element housing, and electrical supply lines. The sensor element housing is at least partially arranged in the first opening. The ceramic sensor element housing has a higher thermal conductivity than the first ceramic housing part. Also disclosed is a method for producing a temperature sensor system.