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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 CP2O30ylKuU+Z9+8q9r66iAmoc0Rc445gLcU7xALtRh0weyA1R2nXnB/w0Se0S4Q
 xqtRyDlKnQaWT5YX2wacQw==

<SEC-DOCUMENT>0000901434-05-000001.txt : 20050611
<SEC-HEADER>0000901434-05-000001.hdr.sgml : 20050611
<ACCEPTANCE-DATETIME>20050531172717
ACCESSION NUMBER:		0000901434-05-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050526
FILED AS OF DATE:		20050531
DATE AS OF CHANGE:		20050531

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PETIT PARKER H
		CENTRAL INDEX KEY:			0000901434

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-09330
		FILM NUMBER:		05868394

	BUSINESS ADDRESS:	
		STREET 1:		1850 PARKWAY PLACE 12TH FLOOR
		CITY:			MARIETTA
		STATE:			GA
		ZIP:			30067

	MAIL ADDRESS:	
		STREET 1:		1850 PARKWAY PL
		CITY:			MARIETTA
		STATE:			GA
		ZIP:			30067

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			INTELLIGENT SYSTEMS CORP
		CENTRAL INDEX KEY:			0000320340
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
		IRS NUMBER:				581964787
		STATE OF INCORPORATION:			GA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		4355 SHACKLEFORD RD
		CITY:			NORCROSS
		STATE:			GA
		ZIP:			30093
		BUSINESS PHONE:		4043812900

	MAIL ADDRESS:	
		STREET 1:		4355 SHACKLEFORD ROAD
		CITY:			NORCROSS
		STATE:			GA
		ZIP:			30093
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-05-26</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000320340</issuerCik>
        <issuerName>INTELLIGENT SYSTEMS CORP</issuerName>
        <issuerTradingSymbol>INS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000901434</rptOwnerCik>
            <rptOwnerName>PETIT PARKER H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1850 PARKWAY PL</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MARIETTA</rptOwnerCity>
            <rptOwnerState>GA</rptOwnerState>
            <rptOwnerZipCode>30067</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Option to purchase common stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>2.0815</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2005-05-26</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>4000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2015-05-26</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, par value $.01 per share</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>4000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">This option shall vest and become exercisable in two equal installments on May 26, 2006 and 2007, respectively.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>J. Leland Strange, as attorney-in-fact for Parker H. Petit</signatureName>
        <signatureDate>2005-05-31</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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