Abstract: In this paper opinions are put forward on the two problems in seepage pressure monitoring for dams in regard to its importance. The authors think that it is untenable for restraining the application of slotted-pipe piezometer by dam height and delay reaction ruled in the technical specification for fill-dam monitoring. The appropriate methods used should be selected upon practical effects. Furthermore, the sensitivity, accuracy and long period stability have been discussed, the performance of long period stability is preferred as embedding instruments selection.