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Bryophytes are important indicators of environmental pollution. At present, bryophytes are mainly used to monitor atmospheric pollution in China. In fact, bryophytes have been widely applied to monitor water quality abroad. In the present paper, we firstly analyzed the literature of applying bryophytes to monitor water environmental quality abroad, then summarized relevant contents of bryomonitoring, which included the types of water pollutants monitored by bryophytes, the species of bryophytes used for bryomonitoring, the influences of the survival status of bryophytes on monitoring effect, the environmental factors affecting the enrichment of heavy metal elements in water by bryophytes, the active and passive methods of applying bryophytes to monitor water pollutions, and the sample preparation, as well as some European cases of bryomonitoring for water environmental quality. Finally we also proposed some suggestions about bryomonitoring researches and application in the future. [ABSTRACT FROM AUTHOR]