With　the　speedy　development　of　China　Internet+,　and　the　rising　of　O2O　business　,　online　shopping　has　now　become　the　novel　approach　for　consumers　among　which　online　food　ordering　has　become　a　new　consuming　activity.　The　EKB　theory　as　research　structure　in　this　study　for　the　better　knowledge　of　online　food　ordering　behavior.　Addressing　these　aspects,　Thinking　Aloud　under　Verbal　Protocol　Analysis　is　utilized　for　collection　of　verbal　protocols　of　the　tested,　and　afterwards　the　coding　of　them.　Observation　and　searching　technique　is　used　for　the　analysis　of　the　differences　on　decision　making　between　novice　users　and　expert　users　when　shopping　with　online　buying　site　Meituan　Application.　The　elements　affecting　consumers＇　buying　decision　is　put　forward　through　coding　results,　for　the　references　of　marketing　strategies.　©　2023　IEEE.