<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-08-07</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000944765</issuerCik><issuerName>MERGE TECHNOLOGIES INC</issuerName>        <issuerTradingSymbol>MRGE</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001229114</rptOwnerCik><rptOwnerName>HAJEK ANNA MARIE</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>917 MERRY LANE</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>OAK BROOK</rptOwnerCity><rptOwnerState>IL</rptOwnerState><rptOwnerZipCode>60523</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-08-07</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>P</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>400</value></transactionShares><transactionPricePerShare><value>13.4</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>7683</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 Anna M. Hajek</signatureName><signatureDate>2003-08-08</signatureDate></ownerSignature></ownershipDocument>

