In　this　work,　the　macro　adsorption　characteristic　of　water　vapor　by　the　allochroic　silica　gel　and　the　zeolite　5A　and　ZSM-5　were　investigated　experimentally.　BET　analysis　method　presented　the　difference　of　the　porosity,　the　micro　pore　volume,　and　the　specific　surface　area　of　the　material.　The　dynamic　and　the　equilibrium　characteristics　of　the　sample　were　measured　thermo-gravimetrically　in　the　moist　air.　In　general,　the　ZSM-5　zeolite　showed　an　inferior　feature　of　the　adsorption　speed　and　the　equilibrium　concentration　to　the　others.　By　comparison　to　the　result　of　SAPO-34　zeolite　in　the　open　literature,　the　5A　zeolite　showed　some　superiorities　of　the　adsorption.　The　equilibrium　concentration　of　the　ZSM-5　zeolite　was　higher　than　that　of　the　SAPO-34　calcined　in　the　nitrogen,　whereas　it　was　lower　than　that　calcined　in　the　air.　The　adsorption　isotherm　was　correlated　and　the　relation　of　the　isotherm　to　the　microstructure　of　the　material　was　discussed.　With　more　mesopore　volume　involved,　the　zeolite　presented　an　S-shaped　isotherm　in　contrast　to　the　exponential　isotherm　of　the　silica　gel.　In　addition,　the　significance　of　the　S-shaped　isotherm　for　the　application　in　adsorption　heat　pump　has　also　been　addressed.