A　unidirectional　isolated　data　acquisition　and　offline　algorithm　verification　system.　An　＂intranet　data　transfer　machine＂　is　constructed　using　DCS　manufacturer　OPC　software;　　an　＂intranet　isolated　transmitter＂　provided　with　an　optical　gate　unidirectional　transmission　device　is　used　for　acquiring　a　critical　process　variable　and　generating　a　data　acquisition　configuration　file　in　the　＂intranet　data　transfer　machine＂　on　the　basis　of　a　universal　intranet　OPC　client;　　an　＂extranet　isolated　receiver＂　provided　with　an　optical　gate　unidirectional　receiving　device　is　used　for　receiving　the　critical　process　data　and　the　configuration　file　from　the　＂intranet　isolated　transmitter＂　by　means　of　a　unidirectional　optical　fiber,　　and　providing　a　forwarding　service　for　the　critical　process　variable　on　the　basis　of　a　universal　extranet　OPC　server　that　meets　an　industry　standard;　　a　customized　extranet　OPC　client　that　meets　the　industry　standard　is　used　for　implementing　a　critical　process　variable　acquisition　and　storage　function　on　an　＂extranet　data　storage　machine＂;　　advanced　algorithms　such　as　modeling,　　control,　　and　optimization　of　a　MSWI　process　are　verified　on　an　＂extranet　algorithm　verification　machine＂　by　comparing　output　of　a　customized　algorithm　verification　module　with　actual　output　of　an　industrial　field.