<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-09-18</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000944765</issuerCik><issuerName>MERGE TECHNOLOGIES INC</issuerName>        <issuerTradingSymbol>MRGE</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001079071</rptOwnerCik><rptOwnerName>MORTIMORE WILLIAM C</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>1126 SOUTH 70TH STREET</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>MILWAUKEE</rptOwnerCity><rptOwnerState>WI</rptOwnerState><rptOwnerZipCode>53214</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>Chairman &amp; Chief Strategist</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common 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Stock</value></securityTitle><transactionDate><value>2003-09-18</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>800</value></transactionShares><transactionPricePerShare><value>17.59</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>570419</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes></footnotes><remarks></remarks><ownerSignature><signatureName>/s/ Julie Ann Schumitsch, by Power of Attorney for William C. Mortimore</signatureName><signatureDate>2003-09-02</signatureDate></ownerSignature></ownershipDocument>

