<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2013-02-20</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0000084290</issuerCik>
        <issuerName>ROBBINS &amp; MYERS, INC.</issuerName>
        <issuerTradingSymbol>RBN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001244816</rptOwnerCik>
            <rptOwnerName>GIROMINI RICHARD J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ROBBINS &amp; MYERS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>10586 HIGHWAY 75 NORTH</rptOwnerStreet2>
            <rptOwnerCity>WILLIS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77378</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2013-02-20</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>4536</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>60.00</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Disposed of pursuant to the Agreement and Plan of Merger dated as of August 8, 2012, by and among the Company, Raven Process Corp. and National Oilwell Varco, Inc., in exchange for a cash payment representing the number of shares held by the reporting person multiplied by the merger price of the common shares of the Company ($60.00 per share).</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>RICHARD J. GIROMINI

by /s/ Linn S. Harson, attorney-in-fact pursuant to previously filed Power of Attorney</signatureName>
        <signatureDate>2013-02-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
