A moving-object position estimating system includes: a moving-object position estimating terminal apparatus that estimates a position a moving object; and an information storing apparatus, wherein the moving-object position estimating terminal apparatus: acquires an image in surroundings of the moving object; obtains feature point information regarding feature points of the acquired image; obtains photography environment information in surroundings of the feature points; associates the feature point information with the photography environment information to set the first environment map information; transmits, to the information storing apparatus, a request for retrieving second environment map information corresponding to the photography environment information in the first environment map information and sending back the second environment map information; and compares the feature point information included in the second environment map information with the feature point information included in the first environment map information to estimate the position of the moving object.