A　visualization　study　on　the　behavior　of　bubbles　has　been　carried　out　for　pool　boiling　of　R141b　on　a　horizontal　transparent　heater　at　pressure　0.1　MPa.　The　behaviors　of　bubbles　were　recorded　by　a　high-speed　camera　placed　beneath　the　heater　surface.　The　departure　diameter,　departure　time　of　bubbles　and　nucleation　site　density　at　different　heat　flux　were　obtained.　The　visualization　results　show　that　bubble　departure　diameter　and　departure　time　decrease,　while　the　nucleation　site　density　increases　as　the　heat　flux　increases.　It　is　also　observed　that　there　is　no　liquid　recruited　into　the　microlayer　in　the　experiment.　Based　on　the　experimental　results,　boiling　curve　for　R141b　was　predicted　by　using　the　dynamic　microlayer　model.　As　a　result,　the　agreement　between　the　predictive　result　based　on　the　dynamic　microlayer　model　and　the　experiment　data　for　boiling　curve　of　R141b　is　good　at　high　heat　flux.