To　improve　the　mode　share　of　public　transport　and　reduce　the　transition　to　private　transport　of　passengers　waiting　at　bus　station,　the　mechanism　of　passengers＇　decision-making　procedure　and　influence　factors　of　the　travel　mode　choice　were　analyzed.　Some　latent　variables　such　as　safety,　comfort,　convenience,　flexibility　and　economy　were　selected　to　reflect　the　satisfaction　degree　of　passengers　on　the　service　level　of　public　transport.　Taking　Jinan　City　as　an　example,　the　questionnaire　of　passengers＇　travel　choice　behavior　at　bus　station　was　designed　and　carried　out.　Based　on　the　structure　equation　model　(SEM),　the　relationship　between　the　satisfaction　degree　and　some　latent　variables　such　as　safety　and　comfort　was　discussed.　The　SEM　method　analysis　shows　that,　of　the　influence　level　of　the　latent　variables　to　the　service　level　of　public　transport,　flexibility　is　the　most　significant　variable　affecting　passenger＇s　satisfaction　degree　followed　by　safety,　convenience,　comfort　and　economy.　Travel　mode　choice　model　of　passengers　waiting　at　bus　station　was　established　with　an　integration　approach　of　SEM　and　nested　logit　(NL)　model.　The　SEM-NL　integration　model　results　reveal　that　gender,　monthly　income,　purpose　of　the　trip,　travel　distance,　safety　and　convenience　service　level　have　a　significant　effect　on　the　choice　of　the　upper　model　(public　transport　or　private　transport).　Passenger＇s　age,　vehicle　ownership　and　bus　ride　frequency　have　great　influence　on　the　choice　of　the　lower　mode　(ORB:　original　route　bus;　ARB:　alternative　route　bus;　Taxi;　and　Shared　bike).　Sensitivity　analysis　reveals　that　the　transition　probabilities　from　private　transport　to　public　transport　can　reach　the　highest　point　(respectively,　69.85%,　68.84%　and　35.51%)　when　safety　service　reaches　level　4,　convenience　service　reaches　level　3,　or　comfort　service　reaches　level　2,　indicating　that　the　safety　level　equal　to　4,　convenience　level　equal　to　3　and　comfort　level　equal　to　2　are　the　key　threshold　to　increase　the　public　transport　mode　share.　Some　proposals　such　as　ensuring　good　accessibility　of　public　transport,　shortening　the　transfer　distance　of　different　routes,　creating　a　comfortable　travel　environment　and　integrating　bus　ticket　system　have　been　put　forward　for　the　sustainable　development　of　public　transport　system.