A recommended operation presenting system (1) includes: an insertion device (10) that has an insertion unit (11); an insertion unit shape detection unit (20, 103) that detects at least a portion of the shape of the insertion unit as shape information; a reference data acquisition unit (108) that acquires recommended operation reference data which includes reference noteworthy state information relating to a prescribed state of the insertion unit and a direction of operation and target state information which are set in advance to correspond to the reference noteworthy state information; a noteworthy state and operation management information calculation unit (104) that calculates noteworthy state information relating to a prescribed state of the insertion unit on the basis of the shape information and calculates operation management information on the basis of at least the noteworthy state information and the target state information; a recommended operation calculation unit (105) that calculates recommended operation information which includes a recommended direction of operation based on at least the noteworthy state information and a recommended amount of operation based on at least the operation management information; and an output information processing unit (106) that outputs information which includes the recommended operation information.
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