Investor-State Dispute Settlement(ISDS) grants a foreign investor the right to access an international arbitrator, if he believes actions taken by a host government are in breach of commitments made in an investment agreement or an investment treaty. The arbitration procedure of ICSID is made specifically to resolve investment disputes, so most of investment disputes have been settled in accordance with the procedure. Owing to limitation of dispute settlements through the ICSID arbitration procedure, several investment dispute conciliation schemes have been emerged as alternatives. In the case of a conciliation, the conciliation procedure will be in progress based on arbitrary agreement between parties, and if both parties agree on a conciliation program, then the arbitrary execution rate is relatively higher than that of arbitration procedures. In addition, it is evaluated that the time duration of conducting a conciliation procedure is in general rather short in 8 to 24months, and its incumbent cost is also rather inexpensive. Most of all, through amicable settlement of a dispute between a foreign investor and a host state, the foreign investor may continue his investment activities without a hitch, while the host state may invite more investment without any risk of losing its external credibility. In conclusion, it is desirable to lead any investment dispute between a foreign investor and a host state settle in accordance with the dispute settlement procedure as specified in the relevant investment agreement. In addition, to make the foreign investor continue his investment activities, it will be necessary to provide a separate investment dispute conciliation system aside from such arbitration procedures to cope any unexpected incident flexibly.