<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-07-30</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000944765</issuerCik><issuerName>MERGE TECHNOLOGIES INC</issuerName>        <issuerTradingSymbol>MRGE</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001257177</rptOwnerCik><rptOwnerName>COUCH GREGORY G</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>1252 SPRUCELEA DRIVE</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>TORONTO</rptOwnerCity><rptOwnerState></rptOwnerState><rptOwnerZipCode>L6J 2E8</rptOwnerZipCode><rptOwnerStateDescription>ONTARIO, CANADA</rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>1</isOther><otherText>Former Officer</otherText></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-07-30</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>C</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>106580</value></transactionShares><transactionPricePerShare><value>0</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>106580</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-07-30</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>C</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>50220</value></transactionShares><transactionPricePerShare><value>0</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>50220</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>Trust</value><footnoteId id="F1" /></natureOfOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><derivativeTable><derivativeHolding><securityTitle><value>Exchangeable Non-Voting</value></securityTitle><conversionOrExercisePrice><value>0</value><footnoteId id="F2" /></conversionOrExercisePrice><exerciseDate><value>2002-06-28</value></exerciseDate><expirationDate><value>2007-06-28</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>109785</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>109785</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Exchangeable Non-voting</value></securityTitle><conversionOrExercisePrice><value>0</value><footnoteId id="F2" /></conversionOrExercisePrice><exerciseDate><value>2003-12-28</value></exerciseDate><expirationDate><value>2007-06-28</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>47045</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>47045</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>Escrow</value><footnoteId id="F3" /></natureOfOwnership></ownershipNature></derivativeHolding></derivativeTable><footnotes><footnote id="F1">Shares held in trust for which Catherine McCallum is Trustee, registered as follows:  The Gregory Couch eFilm Trust</footnote><footnote id="F2">Exchangeable Non-voting Share, no par value, of eFilm Medical Inc. exchangeable on a one-to-one basis for the Common Stock, par value of $0.01 per share, of Merge Technologies Incorporated</footnote><footnote id="F3">Shares held in escrow for which U. S. Bank, N. A. is Trustee, registered as follows:  U. S. Bank, N. A., in trust for Gregory G. Couch</footnote></footnotes><remarks></remarks><ownerSignature><signatureName>/s/ Julie Ann Schumitsch, by Power of Attorney for Gregory Geddes Couch</signatureName><signatureDate>2003-07-30</signatureDate></ownerSignature></ownershipDocument>

