Abstract: A review on methods in common use for determination of hydrogen sulfide gas with their principles (including iodometric titration, methylene blue spectrophotometry, mercurimetric titration, electrochemical method, gas chromatography and absorption-spectrometry) and on the research and recent developments of sensors for H₂S-gas (including metal oxideadsorption sensors, electrochemical sensors and optical sensors) was given in this paper. Virtues and defects, as well as limitations of various kinds of the H₂S-sensors were evaluated, and prospects on the future developments in this field were also given (55 ref. cited).