Tourismwillpromotelocaleconomicdevelopmentandbringinprofit.
boost可以,但促进经济发展一般用promote,boost,不用improve,你看例句:
1.Inrecentyears.dyeingandprintingindustrialzoneswerefoundedinmanycities,whichgreatlypromotedthedevelopmentoflocaleconomy.
2.Itisanimportantandurgenttasktopreservethehistoricalheritagewell,makingitlastforever,andboostthedevelopmentoflocaleconomyatthesametime.